Comparison of e-mail clients
Encyclopedia
The following tables compare general and technical features of a number of email client programs. Please see the individual products articles for further information. This article is not all-inclusive or necessarily up to date.

General

Basic general information about the clients: creator/company, licence/price etc. Clients listed on a light purple background are no longer in active development.
Client Creator Operating system Cost Software license User Interface
Alpine University of Washington
University of Washington
University of Washington is a public research university, founded in 1861 in Seattle, Washington, United States. The UW is the largest university in the Northwest and the oldest public university on the West Coast. The university has three campuses, with its largest campus in the University...

Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

Apache License
Apache License
The Apache License is a copyfree free software license authored by the Apache Software Foundation . The Apache License requires preservation of the copyright notice and disclaimer....

TUI
Text user interface
TUI short for: Text User Interface or Textual User Interface , is a retronym that was coined sometime after the invention of graphical user interfaces, to distinguish them from text-based user interfaces...

Balsa gnome.org Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

GUI
Becky Internet Mail
Becky
is a Japanese television personality, or tarento, under the entertainment company Sun Music Productions. Beginning in late 2009, she began a music career under the name Becky♪♯, with the eighth note and sharp representing "a different half of Becky stepping up".-History:Becky was born in Kanagawa...

Rimarts Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
BlitzMail
BlitzMail
BlitzMail is an e-mail system used at Dartmouth College in Hanover, New Hampshire, United States. It was one of the earliest e-mail server/client packages. It became instantly popular at the college as a result of its simplicity and power, appealing to even the most inexperienced users...

Dartmouth College
Dartmouth College
Dartmouth College is a private, Ivy League university in Hanover, New Hampshire, United States. The institution comprises a liberal arts college, Dartmouth Medical School, Thayer School of Engineering, and the Tuck School of Business, as well as 19 graduate programs in the arts and sciences...

BSD GUI
Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

citadel.org Unix-like
Unix-like
A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification....

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

Web
Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

the Claws Mail team Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

GUI
Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

Courier Mail Server
Courier Mail Server
The Courier mail server is a mail transfer agent server that provides ESMTP, IMAP, POP3, SMAP, webmail, and mailing list services with individual components. It is best known for its IMAP server component....

 developers
Unix-like
Unix-like
A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification....

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

TUI
Text user interface
TUI short for: Text User Interface or Textual User Interface , is a retronym that was coined sometime after the invention of graphical user interfaces, to distinguish them from text-based user interfaces...

Courier (formerly Calypso) Micro Computer Systems, Inc., continued by Rose City Software Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

E&S Software Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Elm Dave D. Taylor
Dave D. Taylor
Dave D. Taylor is an American game programmer, best known as a former id Software employee and noted for his work promoting Linux gaming.In 1993 he graduated from University of Texas at Austin with a Bachelor of Science degree in electrical engineering....

, Sydney Weinstein, Bill Pemberton, Michael Elkins, Kari Hurtta
Unix-like
Unix-like
A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification....

Elm Mail System GPL TUI
Text user interface
TUI short for: Text User Interface or Textual User Interface , is a retronym that was coined sometime after the invention of graphical user interfaces, to distinguish them from text-based user interfaces...

EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

Web CEO Corp. Windows proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Eudora Qualcomm
Qualcomm
Qualcomm is an American global telecommunication corporation that designs, manufactures and markets digital wireless telecommunications products and services based on its code division multiple access technology and other technologies. Headquartered in San Diego, CA, USA...

Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

, Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

Future release, Penelope, will be Free/Open Source
Open source
The term open source describes practices in production and development that promote access to the end product's source materials. Some consider open source a philosophy, others consider it a pragmatic methodology...

 based on Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

GUI
Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Sean O'Connor Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
FirstClass
FirstClass
FirstClass is a client/server groupware, email, online conferencing, voice/fax services, and bulletin-board system for Windows, Macintosh, and Linux...

Open Text proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
GNUMail
GNUMail
GNUMail is a free and open source, cross-platform mail client for GNUstep and Cocoa. It is the official mail client of GNUstep and is also used in Étoilé. It was inspired by NeXTMail , the prime father of Apple Mail...

Ludovic Marcotte and others Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

, Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

GUI
Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

Gnus team Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

TUI
Text user interface
TUI short for: Text User Interface or Textual User Interface , is a retronym that was coined sometime after the invention of graphical user interfaces, to distinguish them from text-based user interfaces...

GroupWise Novell
Novell
Novell, Inc. is a multinational software and services company. It is a wholly owned subsidiary of The Attachmate Group. It specializes in network operating systems, such as Novell NetWare; systems management solutions, such as Novell ZENworks; and collaboration solutions, such as Novell Groupwise...

Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

Memecode Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

, Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

, Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
IBM Lotus Notes Lotus Software
Lotus Software
Lotus Software is a software company with headquarters in Westford, Massachusetts...

 / IBM
IBM
International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...

Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

, Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

, Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
IncrediMail IncrediMail Ltd. Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
KMail KDE
KDE
KDE is an international free software community producing an integrated set of cross-platform applications designed to run on Linux, FreeBSD, Microsoft Windows, Solaris and Mac OS X systems...

Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

GUI
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Apple Inc. Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

 and iOS
proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft
Microsoft
Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...

Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Microsoft Office Outlook Microsoft
Microsoft
Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...

Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

, Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

Mozilla Foundation
Mozilla Foundation
The Mozilla Foundation is a non-profit organization that exists to support and provide leadership for the open source Mozilla project. The organization sets the policies that govern development, operates key infrastructure and controls trademarks and other intellectual property...

, part of Mozilla Application Suite
Mozilla Application Suite
The Mozilla Application Suite is a cross-platform integrated Internet suite. Its development was initiated by Netscape Communications Corporation, before their acquisition by AOL. It is based on the source code of Netscape Communicator...

MPL
Mozilla Public License
The Mozilla Public License is a free and open source software license. Version 1.0 was developed by Mitchell Baker when she worked as a lawyer at Netscape Communications Corporation and version 1.1 at the Mozilla Foundation...

, MPL/GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

/GNU LGPL
GNU Lesser General Public License
The GNU Lesser General Public License or LGPL is a free software license published by the Free Software Foundation . It was designed as a compromise between the strong-copyleft GNU General Public License or GPL and permissive licenses such as the BSD licenses and the MIT License...

 tri-license
GUI
Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

Mozilla Foundation
Mozilla Foundation
The Mozilla Foundation is a non-profit organization that exists to support and provide leadership for the open source Mozilla project. The organization sets the policies that govern development, operates key infrastructure and controls trademarks and other intellectual property...

Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

MPL
Mozilla Public License
The Mozilla Public License is a free and open source software license. Version 1.0 was developed by Mitchell Baker when she worked as a lawyer at Netscape Communications Corporation and version 1.1 at the Mozilla Foundation...

, MPL/GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

/GNU LGPL
GNU Lesser General Public License
The GNU Lesser General Public License or LGPL is a free software license published by the Free Software Foundation . It was designed as a compromise between the strong-copyleft GNU General Public License or GPL and permissive licenses such as the BSD licenses and the MIT License...

 tri-license
GUI
Mulberry Cyrus Daboo (previously Cyrusoft International, Inc./ISAMET Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

(as of version 4.0.5) Apache License
Apache License
The Apache License is a copyfree free software license authored by the Apache Software Foundation . The Apache License requires preservation of the copyright notice and disclaimer....

GUI
Mutt Michael Elkins Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

TUI
Text user interface
TUI short for: Text User Interface or Textual User Interface , is a retronym that was coined sometime after the invention of graphical user interfaces, to distinguish them from text-based user interfaces...

Netscape Messenger Netscape Communications ? GUI
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

Netscape Communications MPL
Mozilla Public License
The Mozilla Public License is a free and open source software license. Version 1.0 was developed by Mitchell Baker when she worked as a lawyer at Netscape Communications Corporation and version 1.1 at the Mozilla Foundation...

, MPL/GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

/GNU LGPL
GNU Lesser General Public License
The GNU Lesser General Public License or LGPL is a free software license published by the Free Software Foundation . It was designed as a compromise between the strong-copyleft GNU General Public License or GPL and permissive licenses such as the BSD licenses and the MIT License...

 tri-license
GUI
nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

RAND Corporation Unix-like
Unix-like
A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification....

BSD CLI
Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

Ximian
Ximian
Ximian was a company that provided free software desktop applications for Linux and Unix based on the GNOME platform. Ximian was founded by Miguel de Icaza and Nat Friedman in October, 1999, and was bought by Novell on August 4, 2003...

Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

GUI
Opera Mail Opera Software
Opera Software
Opera Software ASA is a Norwegian software company, primarily known for its Opera family of web browsers with over 220 million users worldwide. Opera Software is also involved in promoting Web standards through participation in the W3C. The company has its headquarters in Oslo, Norway and is...

Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

, Part of Opera
Opera (web browser)
Opera is a web browser and Internet suite developed by Opera Software with over 200 million users worldwide. The browser handles common Internet-related tasks such as displaying web sites, sending and receiving e-mail messages, managing contacts, chatting on IRC, downloading files via BitTorrent,...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

Microsoft
Microsoft
Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...

Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

David Harris
David Harris (software developer)
David Harris is a software developer from Dunedin, New Zealand. He developed the Pegasus Mail client and the Mercury Mail Transport System, and is a former staff member of the University of Otago....

Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Pine University of Washington
University of Washington
University of Washington is a public research university, founded in 1861 in Seattle, Washington, United States. The UW is the largest university in the Northwest and the oldest public university on the West Coast. The university has three campuses, with its largest campus in the University...

Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

Pine License TUI
Text user interface
TUI short for: Text User Interface or Textual User Interface , is a retronym that was coined sometime after the invention of graphical user interfaces, to distinguish them from text-based user interfaces...

Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

Poco Systems Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Postbox Postbox, Inc. Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

, Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

Proprietary Software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
RoundCube
RoundCube
Roundcube is a web-based IMAP email client written in the PHP programming language. Roundcube's most prominent feature is the pervasive use of Ajax technology to present a more fluid and responsive user interface than that of traditional webmail clients...

The RoundCube Team Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

Web
SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
SeaMonkey Council Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

, part of SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

MPL
Mozilla Public License
The Mozilla Public License is a free and open source software license. Version 1.0 was developed by Mitchell Baker when she worked as a lawyer at Netscape Communications Corporation and version 1.1 at the Mozilla Foundation...

, MPL/GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

/GNU LGPL
GNU Lesser General Public License
The GNU Lesser General Public License or LGPL is a free software license published by the Free Software Foundation . It was designed as a compromise between the strong-copyleft GNU General Public License or GPL and permissive licenses such as the BSD licenses and the MIT License...

 tri-license
GUI
Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

Hiroyuki Yamamoto Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

/GNU LGPL
GNU Lesser General Public License
The GNU Lesser General Public License or LGPL is a free software license published by the Free Software Foundation . It was designed as a compromise between the strong-copyleft GNU General Public License or GPL and permissive licenses such as the BSD licenses and the MIT License...

GUI
Spicebird
Spicebird
Spicebird is a personal information manager based on Mozilla Thunderbird's code developed by an Indian company called . It is free and open source software....

Synovel Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

, Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

, BSD
MPL
Mozilla Public License
The Mozilla Public License is a free and open source software license. Version 1.0 was developed by Mitchell Baker when she worked as a lawyer at Netscape Communications Corporation and version 1.1 at the Mozilla Foundation...

, MPL/GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

/GNU LGPL
GNU Lesser General Public License
The GNU Lesser General Public License or LGPL is a free software license published by the Free Software Foundation . It was designed as a compromise between the strong-copyleft GNU General Public License or GPL and permissive licenses such as the BSD licenses and the MIT License...

 tri-license
GUI
SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

The SquirrelMail Project Team Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

 v2
Web
The Bat RitLabs Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Thus PLC (Demon Internet)
Demon Internet
Demon Internet is a British Internet Service Provider. It was one of the UK's earliest ISPs, especially targeting the "dialup" audience. It started on 1 June 1992 from an idea posted on CIX by Cliff Stanford of Demon Systems Ltd. The branch in the Netherlands started in 1996, and was sold to KPN...

Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Microsoft
Microsoft
Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...

Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

Microsoft
Microsoft
Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...

Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

proprietary software
Proprietary software
Proprietary software is computer software licensed under exclusive legal right of the copyright holder. The licensee is given the right to use the software under certain conditions, while restricted from other uses, such as modification, further distribution, or reverse engineering.Complementary...

GUI
YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

YAM Open Source Team and contributing authors AmigaOS
AmigaOS
AmigaOS is the default native operating system of the Amiga personal computer. It was developed first by Commodore International, and initially introduced in 1985 with the Amiga 1000...

GNU GPL
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

GUI
Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

Cross-platform
Cross-platform
In computing, cross-platform, or multi-platform, is an attribute conferred to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms...

MPL
Mozilla Public License
The Mozilla Public License is a free and open source software license. Version 1.0 was developed by Mitchell Baker when she worked as a lawyer at Netscape Communications Corporation and version 1.1 at the Mozilla Foundation...

 on server and ZPL
Zope Public License
Zope Public License is a free software license, used primarily for the Zope application server software. The license is similar to the well-known BSD license, however the ZPL also adds clauses prohibiting trademark use and requiring documentation of all changes.-External links:* v2.0 at the Open...

 (attribution clause) on client
GUI
Client Creator Operating System Cost Software license User Interface


Release history

A brief overview of the release history.
Client First public release First stable release Latest stable release
Date Version Date Version
Alpine November 2006 0.8 December 2007 1.00
Becky Internet Mail
Becky
is a Japanese television personality, or tarento, under the entertainment company Sun Music Productions. Beginning in late 2009, she began a music career under the name Becky♪♯, with the eighth note and sharp representing "a different half of Becky stepping up".-History:Becky was born in Kanagawa...

Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

1987 1988 1.00
Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

May 2001 0.4.67 January 2005 1.0.0
Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

May 2003 0.50 May 2003 0.50
Courier June, 2004 3.5 discontinued discontinued discontinued
Elm
EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

October 2010 2.0 March 2011 3.11
EM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

2.7 (Sept 14, 2010)
Eudora 1988 1988
Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

November 2002 1.0 November 2002 1.0
Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

1987 February 1, 1988 2.0
GroupWise 1986 1.0
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

1999 1.00
IBM Lotus Notes 1989 1.0 1989 1.0
KMail October 1998 Alpha February 1999 1.0.17
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

September 13, 2000 Public Beta March 24, 2001 1.0
Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft Office Outlook 1997 97 1997 97
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

December 7, 1998 "Preview" March 19, 1999 M3 discontinued
Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

July 28, 2003 0.1 December 7, 2004 1.0
Mulberry September 20, 1996 1.0 September 20, 1996 1.0
Mutt 1995
Netscape Messenger discontinued
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

November 15, 2007 9.0a1 discontinued discontinued discontinued
nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

1979
Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

11 May 2000 0.0 3 December 2001 1.0
Opera Mail September 1996 2.1b1 December 1996 2.1
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

1996 3.0
Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

1990 1990
Pine January 15, 1992 2.00 January 15, 1992 2.00
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

1999
SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
September 15, 2005 1.0a January 30, 2006 1.0
SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

December 1999 0.1 January 2001 1.0
Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

January 2000 0.1.0 December 2004 1.0.0
The Bat March 1997 1.0 Beta March 1998 1.00 Build 1310
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

circa 1996 1.0 circa 1996 1.0
Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

1995 1.0 1995 1.0
Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

November, 2005 Beta March, 2006 3.5
Client Date Version Date Version Latest stable release
First public release First stable release

Operating system support

The operating system
Operating system
An operating system is a set of programs that manage computer hardware resources and provide common services for application software. The operating system is the most important type of system software in a computer system...

s on which the clients can run natively (without emulation).
Client Microsoft Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

BSD Unix
Unix
Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...

FreeDOS
FreeDOS
FreeDOS is an operating system for IBM PC compatible computers. FreeDOS is made up of many different, separate programs that act as "packages" to the overall FreeDOS Project...

, DOS
DOS
DOS, short for "Disk Operating System", is an acronym for several closely related operating systems that dominated the IBM PC compatible market between 1981 and 1995, or until about 2000 if one includes the partially DOS-based Microsoft Windows versions 95, 98, and Millennium Edition.Related...

Other
Alpine
Balsa
Becky Internet Mail
Becky
is a Japanese television personality, or tarento, under the entertainment company Sun Music Productions. Beginning in late 2009, she began a music career under the name Becky♪♯, with the eighth note and sharp representing "a different half of Becky stepping up".-History:Becky was born in Kanagawa...

Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

Courier
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

Elm
EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

Eudora
Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

GroupWise
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

IBM Lotus Notes
IncrediMail
KMail
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

(2008)
Microsoft Office Outlook
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

colspan="5" (1.7.13)
Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

Mulberry
Mutt
Netscape Messenger colspan="5" (4.80)
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

colspan="5" (9.0a1)
nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

Opera Mail
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

(up to XP)
Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

Pine (3.96)
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

Postbox
SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

Spicebird
Spicebird
Spicebird is a personal information manager based on Mozilla Thunderbird's code developed by an Indian company called . It is free and open source software....

SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

The Bat
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

(Vista)
YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

Client Microsoft Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

BSD Unix
Unix
Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...

FreeDOS
FreeDOS
FreeDOS is an operating system for IBM PC compatible computers. FreeDOS is made up of many different, separate programs that act as "packages" to the overall FreeDOS Project...

, DOS
DOS
DOS, short for "Disk Operating System", is an acronym for several closely related operating systems that dominated the IBM PC compatible market between 1981 and 1995, or until about 2000 if one includes the partially DOS-based Microsoft Windows versions 95, 98, and Millennium Edition.Related...

Other

Communication and access protocol support

What email and related protocols and standards are supported by each client.
Client POP3
Post Office Protocol
In computing, the Post Office Protocol is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP and IMAP are the two most prevalent Internet standard protocols for e-mail retrieval. Virtually all modern...

 
fetch all messages
POP3
Post Office Protocol
In computing, the Post Office Protocol is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP and IMAP are the two most prevalent Internet standard protocols for e-mail retrieval. Virtually all modern...

 
selected by filter
POP3
Post Office Protocol
In computing, the Post Office Protocol is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP and IMAP are the two most prevalent Internet standard protocols for e-mail retrieval. Virtually all modern...

 
selected by user
IMAP4
Internet Message Access Protocol
Internet message access protocol is one of the two most prevalent Internet standard protocols for e-mail retrieval, the other being the Post Office Protocol...


SMTP
Simple Mail Transfer Protocol
Simple Mail Transfer Protocol is an Internet standard for electronic mail transmission across Internet Protocol networks. SMTP was first defined by RFC 821 , and last updated by RFC 5321 which includes the extended SMTP additions, and is the protocol in widespread use today...


NNTP
Network News Transfer Protocol
The Network News Transfer Protocol is an Internet application protocol used for transporting Usenet news articles between news servers and for reading and posting articles by end user client applications...


LDAP
Lightweight Directory Access Protocol
The Lightweight Directory Access Protocol is an application protocol for accessing and maintaining distributed directory information services over an Internet Protocol network...

 v2
LDAP
Lightweight Directory Access Protocol
The Lightweight Directory Access Protocol is an application protocol for accessing and maintaining distributed directory information services over an Internet Protocol network...

 v3
EWS
Microsoft Exchange Server
Microsoft Exchange Server is the server side of a client–server, collaborative application product developed by Microsoft. It is part of the Microsoft Servers line of server products and is used by enterprises using Microsoft infrastructure products...

IPv6
IPv6
Internet Protocol version 6 is a version of the Internet Protocol . It is designed to succeed the Internet Protocol version 4...

MAPI
Alpine
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Becky Internet Mail
Becky
is a Japanese television personality, or tarento, under the entertainment company Sun Music Productions. Beginning in late 2009, she began a music career under the name Becky♪♯, with the eighth note and sharp representing "a different half of Becky stepping up".-History:Becky was born in Kanagawa...

Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

Courier
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

Elm
EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

GroupWise
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

IBM Lotus Notes
KMail
Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft Entourage 2008, Web Services Edition
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft Office Outlook
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

extensible
Mulberry
Mutt No (possible with POP3 browser) No (possible with POP3 browser) (slrn
Slrn
slrn is an open source text-based news client. It was originally developed for Unix-like operating systems, but is now available for many other operating systems, including Microsoft Windows....

 looks alike)
(resolve real names through NSS)
Netscape Messenger
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

Opera Mail
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

Pine
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

Spicebird
Spicebird
Spicebird is a personal information manager based on Mozilla Thunderbird's code developed by an Indian company called . It is free and open source software....

The Bat
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

Client POP3
Post Office Protocol
In computing, the Post Office Protocol is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP and IMAP are the two most prevalent Internet standard protocols for e-mail retrieval. Virtually all modern...

 
fetch all messages
POP3
Post Office Protocol
In computing, the Post Office Protocol is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP and IMAP are the two most prevalent Internet standard protocols for e-mail retrieval. Virtually all modern...

 
selected by filter
POP3
Post Office Protocol
In computing, the Post Office Protocol is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP and IMAP are the two most prevalent Internet standard protocols for e-mail retrieval. Virtually all modern...

 
selected by user
IMAP4
Internet Message Access Protocol
Internet message access protocol is one of the two most prevalent Internet standard protocols for e-mail retrieval, the other being the Post Office Protocol...

SMTP
Simple Mail Transfer Protocol
Simple Mail Transfer Protocol is an Internet standard for electronic mail transmission across Internet Protocol networks. SMTP was first defined by RFC 821 , and last updated by RFC 5321 which includes the extended SMTP additions, and is the protocol in widespread use today...

NNTP
Network News Transfer Protocol
The Network News Transfer Protocol is an Internet application protocol used for transporting Usenet news articles between news servers and for reading and posting articles by end user client applications...

LDAP
Lightweight Directory Access Protocol
The Lightweight Directory Access Protocol is an application protocol for accessing and maintaining distributed directory information services over an Internet Protocol network...

 v2
LDAP
Lightweight Directory Access Protocol
The Lightweight Directory Access Protocol is an application protocol for accessing and maintaining distributed directory information services over an Internet Protocol network...

 v3
EWS
Microsoft Exchange Server
Microsoft Exchange Server is the server side of a client–server, collaborative application product developed by Microsoft. It is part of the Microsoft Servers line of server products and is used by enterprises using Microsoft infrastructure products...

IPv6
IPv6
Internet Protocol version 6 is a version of the Internet Protocol . It is designed to succeed the Internet Protocol version 4...

MAPI

Client IMSP
IMSP
IMSP is Internet Message Support Protocol. Defined in a 1995 , which carries this abstract:Work on standardizing IMSP was never completed because development of the ACAP protocol, which has a superset of IMSP's functionality.- Implementations :...


ACAP
Application Configuration Access Protocol
The Application Configuration Access Protocol is a protocol for storing and synchronizing general configuration and preference data. It was originally developed so that IMAP clients can easily access address books, user options, and other data on a central server and be kept in synch across all...


RSS 0.91
RSS (file format)
RSS is a family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format...

 Feeds
Web feed
A web feed is a data format used for providing users with frequently updated content. Content distributors syndicate a web feed, thereby allowing users to subscribe to it. Making a collection of web feeds accessible in one spot is known as aggregation, which is performed by an aggregator...

RSS 1.0
RSS (file format)
RSS is a family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format...

 Feeds
Web feed
A web feed is a data format used for providing users with frequently updated content. Content distributors syndicate a web feed, thereby allowing users to subscribe to it. Making a collection of web feeds accessible in one spot is known as aggregation, which is performed by an aggregator...

RSS 2.0
RSS (file format)
RSS is a family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format...

 Feeds
Web feed
A web feed is a data format used for providing users with frequently updated content. Content distributors syndicate a web feed, thereby allowing users to subscribe to it. Making a collection of web feeds accessible in one spot is known as aggregation, which is performed by an aggregator...

ATOM
Atom (standard)
The name Atom applies to a pair of related standards. The Atom Syndication Format is an XML language used for web feeds, while the Atom Publishing Protocol is a simple HTTP-based protocol for creating and updating web resources.Web feeds allow software programs to check for updates published on a...

 Feeds
Web feed
A web feed is a data format used for providing users with frequently updated content. Content distributors syndicate a web feed, thereby allowing users to subscribe to it. Making a collection of web feeds accessible in one spot is known as aggregation, which is performed by an aggregator...

iCalendar
ICalendar
iCalendar is a computer file format which allows Internet users to send meeting requests and tasks to other Internet users, via email, or sharing files with an extension of .ics...

MAPI/RPC
Messaging Application Programming Interface
Messaging Application Programming Interface is a messaging architecture and a Component Object Model based API for Microsoft Windows. MAPI allows client programmes to become messaging-enabled, -aware, or -based by calling MAPI subsystem routines that interface with certain messaging servers...

Alpine
Becky Internet Mail
Becky
is a Japanese television personality, or tarento, under the entertainment company Sun Music Productions. Beginning in late 2009, she began a music career under the name Becky♪♯, with the eighth note and sharp representing "a different half of Becky stepping up".-History:Becky was born in Kanagawa...

Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

Courier
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

Elm
EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

Eudora
Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

GroupWise
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

IBM Lotus Notes
KMail
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft Office Outlook
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

Mulberry
Mutt
Netscape Messenger
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

Opera Mail
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

Pine
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

Spicebird
Spicebird
Spicebird is a personal information manager based on Mozilla Thunderbird's code developed by an Indian company called . It is free and open source software....

The Bat
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

Client IMSP
IMSP
IMSP is Internet Message Support Protocol. Defined in a 1995 , which carries this abstract:Work on standardizing IMSP was never completed because development of the ACAP protocol, which has a superset of IMSP's functionality.- Implementations :...

ACAP
Application Configuration Access Protocol
The Application Configuration Access Protocol is a protocol for storing and synchronizing general configuration and preference data. It was originally developed so that IMAP clients can easily access address books, user options, and other data on a central server and be kept in synch across all...

RSS 0.91
RSS (file format)
RSS is a family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format...

 Feeds
Web feed
A web feed is a data format used for providing users with frequently updated content. Content distributors syndicate a web feed, thereby allowing users to subscribe to it. Making a collection of web feeds accessible in one spot is known as aggregation, which is performed by an aggregator...

RSS 1.0
RSS (file format)
RSS is a family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format...

 Feeds
Web feed
A web feed is a data format used for providing users with frequently updated content. Content distributors syndicate a web feed, thereby allowing users to subscribe to it. Making a collection of web feeds accessible in one spot is known as aggregation, which is performed by an aggregator...

RSS 2.0
RSS (file format)
RSS is a family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format...

 Feeds
Web feed
A web feed is a data format used for providing users with frequently updated content. Content distributors syndicate a web feed, thereby allowing users to subscribe to it. Making a collection of web feeds accessible in one spot is known as aggregation, which is performed by an aggregator...

ATOM
Atom (standard)
The name Atom applies to a pair of related standards. The Atom Syndication Format is an XML language used for web feeds, while the Atom Publishing Protocol is a simple HTTP-based protocol for creating and updating web resources.Web feeds allow software programs to check for updates published on a...

 Feeds
Web feed
A web feed is a data format used for providing users with frequently updated content. Content distributors syndicate a web feed, thereby allowing users to subscribe to it. Making a collection of web feeds accessible in one spot is known as aggregation, which is performed by an aggregator...

iCalendar
ICalendar
iCalendar is a computer file format which allows Internet users to send meeting requests and tasks to other Internet users, via email, or sharing files with an extension of .ics...

MAPI/RPC

Authentication support

Client Regular MSN (NTLM
NTLM
In a Windows network, NTLM is a suite of Microsoft security protocols that provides authentication, integrity, and confidentiality to users....

)
browser login
Compuserve
(RPA)
MD5 APOP  CRAM-HMAC  DIGEST-MD5 with hardware token
PKCS#11
PKCS11
In cryptography, PKCS #11 is one of the family of standards called Public-Key Cryptography Standards , published by RSA Laboratories, that defines a platform-independent API to cryptographic tokens, such as Hardware Security Modules and smart cards...

Biometric SMTP Auth  SSL/TLS Client Certificate
LOGIN PLAIN MD5 SHA1 RIPEMD
Alpine
Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

Courier
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

Elm
EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

Eudora
Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

GroupWise
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

IBM Lotus Notes
KMail
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft Office Outlook
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

https://bugzilla.mozilla.org/show_bug.cgi?id=335924
Mulberry
Mutt
Netscape Messenger
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

Opera Mail
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

Pine
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
https://bugzilla.mozilla.org/show_bug.cgi?id=335924
SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

The Bat
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

Client Regular MSN (NTLM
NTLM
In a Windows network, NTLM is a suite of Microsoft security protocols that provides authentication, integrity, and confidentiality to users....

)
browser login
Compuserve
(RPA)
MD5 APOP  CRAM-HMAC  DIGEST-MD5 with hardware token
PKCS#11
PKCS11
In cryptography, PKCS #11 is one of the family of standards called Public-Key Cryptography Standards , published by RSA Laboratories, that defines a platform-independent API to cryptographic tokens, such as Hardware Security Modules and smart cards...

Biometric SMTP Auth  SSL/TLS Client Certificate
LOGIN PLAIN MD5 SHA1 RIPEMD


SSL and TLS support

Client Secure POP3 Secure IMAP4 Secure SMTP Secure NNTP Secure LDAP OCSP  CRL 
SSL SSL SSL SSL TLS SSL TLS
Alpine
Becky Internet Mail
Becky
is a Japanese television personality, or tarento, under the entertainment company Sun Music Productions. Beginning in late 2009, she began a music career under the name Becky♪♯, with the eighth note and sharp representing "a different half of Becky stepping up".-History:Becky was born in Kanagawa...

Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

Courier
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

Elm
EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

Eudora
Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

GroupWise
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

IBM Lotus Notes
KMail
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft Office Outlook
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

Mulberry
Mutt
Netscape Messenger
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

Opera Mail
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

Pine
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

Spicebird
Spicebird
Spicebird is a personal information manager based on Mozilla Thunderbird's code developed by an Indian company called . It is free and open source software....

The Bat
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

Client Secure POP3 Secure IMAP4 Secure SMTP Secure NNTP Secure LDAP OCSP  CRL 
SSL SSL SSL SSL TLS SSL TLS


General features

For all of these clients, the concept of "HTML support" does not mean that they can process the full range of HTML that a web browser can handle. Almost all email readers limit HTML features, either for security reasons, or because of the nature of the interface. CSS and JavaScript can be especially problematic. A number of articles describe these limitations per-email-client; see 1, 2, 3, and 4
Client HTML email UTF-8
UTF-8
UTF-8 is a multibyte character encoding for Unicode. Like UTF-16 and UTF-32, UTF-8 can represent every character in the Unicode character set. Unlike them, it is backward-compatible with ASCII and avoids the complications of endianness and byte order marks...

 support
Image blocking Junk filtering Phishing
Phishing
Phishing is a way of attempting to acquire information such as usernames, passwords, and credit card details by masquerading as a trustworthy entity in an electronic communication. Communications purporting to be from popular social web sites, auction sites, online payment processors or IT...

 filtering
Thread view Conversation view PGP
Pretty Good Privacy
Pretty Good Privacy is a data encryption and decryption computer program that provides cryptographic privacy and authentication for data communication. PGP is often used for signing, encrypting and decrypting texts, E-mails, files, directories and whole disk partitions to increase the security...

 support
S/MIME
S/MIME
S/MIME is a standard for public key encryption and signing of MIME data. S/MIME is on an IETF standards track and defined in a number of documents, most importantly RFCs. S/MIME was originally developed by RSA Data Security Inc...

 support
local server- side inline PGP/MIME or OpenPGP protocol OCSP CRL
Certificate revocation list
In the operation of some cryptosystems, usually public key infrastructures , a certificate revocation list is a list of certificates that have been revoked, and therefore should not be relied upon.-Revocation States:There are two different states of revocation defined in RFC 3280:* Revoked: A...

certificates on tokens, smartcards support
Alpine
Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

Courier
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

Elm
EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

Eudora
Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

GroupWise
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

IBM Lotus Notes
(4.1.2+)
, http://publib-b.boulder.ibm.com/lotus/c2359840.nsf/b3266a3c17f9bb7085256b870069c0a9/9b7f328aa2eacd9385257361004fd8a4?OpenDocument
KMail
(with GPG)

(1.5+, with GPGME)
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft Office Outlook (2010+)
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

Mulberry
Mutt Yes
(no support for images)
(with GPGME)
Netscape Messenger
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

Opera Mail
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

Yes
(sending is broken)
Pine
(with Pine Privacy Guard)
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
Spicebird
Spicebird
Spicebird is a personal information manager based on Mozilla Thunderbird's code developed by an Indian company called . It is free and open source software....

SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

(depends on antivirus)
Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

The Bat
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

(depends on antivirus)
Client HTML email UTF-8
UTF-8
UTF-8 is a multibyte character encoding for Unicode. Like UTF-16 and UTF-32, UTF-8 can represent every character in the Unicode character set. Unlike them, it is backward-compatible with ASCII and avoids the complications of endianness and byte order marks...

 support
Image blocking Junk filtering Phishing
Phishing
Phishing is a way of attempting to acquire information such as usernames, passwords, and credit card details by masquerading as a trustworthy entity in an electronic communication. Communications purporting to be from popular social web sites, auction sites, online payment processors or IT...

 filtering
Thread view Conver- sation view PGP
Pretty Good Privacy
Pretty Good Privacy is a data encryption and decryption computer program that provides cryptographic privacy and authentication for data communication. PGP is often used for signing, encrypting and decrypting texts, E-mails, files, directories and whole disk partitions to increase the security...

 support
S/MIME
S/MIME
S/MIME is a standard for public key encryption and signing of MIME data. S/MIME is on an IETF standards track and defined in a number of documents, most importantly RFCs. S/MIME was originally developed by RSA Data Security Inc...

 support
local server- side inline PGP/MIME or OpenPGP protocol OCSP CRL
Certificate revocation list
In the operation of some cryptosystems, usually public key infrastructures , a certificate revocation list is a list of certificates that have been revoked, and therefore should not be relied upon.-Revocation States:There are two different states of revocation defined in RFC 3280:* Revoked: A...

certificates on tokens, smartcards support


Messages features

Client Label messages Reformat received messages Bi-?directional text support
Right-to-left
A language is described as right-to-left if writing starts from the right of the page, and continues to the left. Right to left scripts are:* Arabic alphabet - used for Arabic, Persian, Urdu and many other languages....

Composing messages Native images preview Postpone/?scheduled message sending Native documents preview
with colors with flag antidelete add note edit headers (e.g., Subject) Spell checking
Spell checker
In computing, a spell checker is an application program that flags words in a document that may not be spelled correctly. Spell checkers may be stand-alone capable of operating on a block of text, or as part of a larger application, such as a word processor, email client, electronic dictionary,...

Signatures
Signature block
A signature block is a block of text automatically appended at the bottom of an e-mail message, Usenet article, or forum post. This has the effect of "signing off" the message and in a reply message of indicating that no more response follows...

Bottom-posts replies jpeg
JPEG
In computing, JPEG . The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality....

gif
GIF
The Graphics Interchange Format is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability....

bmp
Windows bitmap
The BMP File Format, also known as Bitmap Image File or Device Independent Bitmap file format or simply a Bitmap, is a Raster graphics image file format used to store bitmap digital images, independently of the display device , especially on Microsoft Windows and OS/2 operating systems.The BMP...

png others txt
Text file
A text file is a kind of computer file that is structured as a sequence of lines of electronic text. A text file exists within a computer file system...

pdf
Portable Document Format
Portable Document Format is an open standard for document exchange. This file format, created by Adobe Systems in 1993, is used for representing documents in a manner independent of application software, hardware, and operating systems....

doc
DOC (computing)
In computing, DOC or doc is a filename extension for word processing documents; most commonly for Microsoft Word. Historically, the extension was used for documentation in plain-text format, particularly of programs or computer hardware, on a wide range of operating systems...

xls
Microsoft Excel
Microsoft Excel is a proprietary commercial spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. It features calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications...

odt
OpenDocument
The Open Document Format for Office Applications is an XML-based file format for representing electronic documents such as spreadsheets, charts, presentations and word processing documents....

ods
OpenDocument
The Open Document Format for Office Applications is an XML-based file format for representing electronic documents such as spreadsheets, charts, presentations and word processing documents....

others
Alpine
Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

Courier
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

Elm
EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

Eudora
Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

GroupWise
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

IBM Lotus Notes
KMail
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft Office Outlook PowerPoint
Microsoft PowerPoint
Microsoft PowerPoint, usually just called PowerPoint, is a non-free commercial presentation program developed by Microsoft. It is part of the Microsoft Office suite, and runs on Microsoft Windows and Apple's Mac OS X operating system...

Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

http://forum.addonsmirror.net/index.php?showtopic=1906, not via IMAP https://addons.mozilla.org/en-US/thunderbird/reviews/display/875#review-113538
Mulberry
Mutt
Netscape Messenger
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

Opera Mail
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

Pine
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

The Bat
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

Client Label messages Reformat received messages Bi-?directional text support
Right-to-left
A language is described as right-to-left if writing starts from the right of the page, and continues to the left. Right to left scripts are:* Arabic alphabet - used for Arabic, Persian, Urdu and many other languages....

Composing messages Native images preview Postpone/?scheduled message sending Native documents preview
with colors with flag antidelete add note edit headers (e.g., Subject) Spell checking
Spell checker
In computing, a spell checker is an application program that flags words in a document that may not be spelled correctly. Spell checkers may be stand-alone capable of operating on a block of text, or as part of a larger application, such as a word processor, email client, electronic dictionary,...

Signatures
Signature block
A signature block is a block of text automatically appended at the bottom of an e-mail message, Usenet article, or forum post. This has the effect of "signing off" the message and in a reply message of indicating that no more response follows...

Bottom-posts replies jpeg
JPEG
In computing, JPEG . The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality....

gif
GIF
The Graphics Interchange Format is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability....

bmp
Windows bitmap
The BMP File Format, also known as Bitmap Image File or Device Independent Bitmap file format or simply a Bitmap, is a Raster graphics image file format used to store bitmap digital images, independently of the display device , especially on Microsoft Windows and OS/2 operating systems.The BMP...

png others txt
Text file
A text file is a kind of computer file that is structured as a sequence of lines of electronic text. A text file exists within a computer file system...

pdf
Portable Document Format
Portable Document Format is an open standard for document exchange. This file format, created by Adobe Systems in 1993, is used for representing documents in a manner independent of application software, hardware, and operating systems....

doc
DOC (computing)
In computing, DOC or doc is a filename extension for word processing documents; most commonly for Microsoft Word. Historically, the extension was used for documentation in plain-text format, particularly of programs or computer hardware, on a wide range of operating systems...

xls
Microsoft Excel
Microsoft Excel is a proprietary commercial spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. It features calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications...

odt
OpenDocument
The Open Document Format for Office Applications is an XML-based file format for representing electronic documents such as spreadsheets, charts, presentations and word processing documents....

ods
OpenDocument
The Open Document Format for Office Applications is an XML-based file format for representing electronic documents such as spreadsheets, charts, presentations and word processing documents....

others


Database, folders and customization

Client Message file format Encrypted database Virtual folder
Virtual folder
In computing, a virtual folder generally denotes an organizing principle for files that is not dependent on location in a hierarchical directory tree...

s
Scheduled backup New mail notification Customizable interface Customizable keybindings Fragmented messages Database search with regular expression
Regular expression
In computing, a regular expression provides a concise and flexible means for "matching" strings of text, such as particular characters, words, or patterns of characters. Abbreviations for "regular expression" include "regex" and "regexp"...

s support
Indexed search
Indexed search
Indexed search, also called the cutpoint method, is an algorithm for discrete-distribution pseudo-random number sampling, invented by Chen and Asau in 1974.- Literature :...

Search folders IMAP search
ticker tray icon tooltip sound
Alpine mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

, mbx, MIX
MIX (Email)
MIX is a high-performance, indexed, on-disk email storage system that is designed for use with the IMAP protocol. MIX was designed by Mark Crispin, the author of the IMAP protocol. Server support for it has been included in releases of UW IMAP since 2006, Panda IMAP, and Messaging Architects...

, maildir
Maildir
The Maildir e-mail format is a common way of storing e-mail messages, where each message is kept in a separate file with a unique name, and each folder is a directory...

 (with patches), MMDF
MMDF
MMDF, the Multichannel Memorandum Distribution Facility, is a message transfer agent , a computer program designed to transmit email.-History:...

, tenex, mtx, MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

, mx, news, phile
Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

, mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

, maildir
Maildir
The Maildir e-mail format is a common way of storing e-mail messages, where each message is kept in a separate file with a unique name, and each folder is a directory...

(colors)
Courier Proprietary (weak) (layout)
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

Proprietary (sqlite) (layout)
Elm
EmailTray
EmailTray
EmailTray is a lightweight email client for the Microsoft Windows operating system. EmailTray was developed by Web CEO Corp., a software development company.EmailTray 2.0 was publicly released on October 7, 2010 as a free desktop email client...

Proprietary
Eudora mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

babyl, maildir
Maildir
The Maildir e-mail format is a common way of storing e-mail messages, where each message is kept in a separate file with a unique name, and each folder is a directory...

, mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

, MMDF
MMDF
MMDF, the Multichannel Memorandum Distribution Facility, is a message transfer agent , a computer program designed to transmit email.-History:...

, news, rnews, SOUP, outlook, oe-dbx
GroupWise Proprietary
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

Proprietary (sqlite
SQLite
SQLite is an ACID-compliant embedded relational database management system contained in a relatively small C programming library. The source code for SQLite is in the public domain and implements most of the SQL standard...

)
IBM Lotus Notes Proprietary http://www.ibm.com/developerworks/lotus/library/ls-Notes_Encryption/#N10102
KMail mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

, maildir
Maildir
The Maildir e-mail format is a common way of storing e-mail messages, where each message is kept in a separate file with a unique name, and each folder is a directory...

Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Proprietary
Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Proprietary (Personal Storage Table)
Microsoft Office Outlook Proprietary (Personal Storage Table)
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

(as of 3.0)
Mulberry mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

 
Mutt mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

, MMDF
MMDF
MMDF, the Multichannel Memorandum Distribution Facility, is a message transfer agent , a computer program designed to transmit email.-History:...

, MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

, maildir
Maildir
The Maildir e-mail format is a common way of storing e-mail messages, where each message is kept in a separate file with a unique name, and each folder is a directory...

(with compressed folders patch http://www.spinnaker.de/mutt/compressed/) (has limit command) no integrated solutions available No (easily integrated with mairix)
Netscape Messenger mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

MH
Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

maildir
Maildir
The Maildir e-mail format is a common way of storing e-mail messages, where each message is kept in a separate file with a unique name, and each folder is a directory...

, mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

, MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

Opera Mail mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

 (9.10 and Below)

(all folders are virtual)
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

Proprietary
Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

Proprietary
Pine mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

, mbx, MIX
MIX
MIX is a hypothetical computer used in Donald Knuth's monograph, The Art of Computer Programming . MIX's model number is 1009, which was derived by combining the model numbers and names of several contemporaneous, commercial machines deemed significant by the author...

, maildir
Maildir
The Maildir e-mail format is a common way of storing e-mail messages, where each message is kept in a separate file with a unique name, and each folder is a directory...

 (with patches), MMDF
MMDF
MMDF, the Multichannel Memorandum Distribution Facility, is a message transfer agent , a computer program designed to transmit email.-History:...

, tenex, mtx, MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

, mx, news, phile
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

mbox
SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
mbox
Mbox
mbox is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file...

SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

[IMAP Server]
Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

The Bat Proprietary Yes (RC2 128 bit)
(with Pro and Voyager version)

(PCRE 6.2)
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Proprietary
Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

File system
File system
A file system is a means to organize data expected to be retained after a program terminates by providing procedures to store, retrieve and update data, as well as manage the available space on the device which contain it. A file system organizes data in an efficient manner and is tuned to the...

Client Message file format Encrypted database Virtual folder
Virtual folder
In computing, a virtual folder generally denotes an organizing principle for files that is not dependent on location in a hierarchical directory tree...

s
Scheduled backup New mail notification Customizable interface Customizable keybindings Fragmented messages Database search with regular expression
Regular expression
In computing, a regular expression provides a concise and flexible means for "matching" strings of text, such as particular characters, words, or patterns of characters. Abbreviations for "regular expression" include "regex" and "regexp"...

s support
Indexed search
Indexed search
Indexed search, also called the cutpoint method, is an algorithm for discrete-distribution pseudo-random number sampling, invented by Chen and Asau in 1974.- Literature :...

Search folders IMAP search
ticker tray icon tooltip sound


Templates, scripts and programming languages

Client Message templates Message templates individual for Support in message templates scripts, programming languages
new reply forward read confirmation save print JavaScript
JavaScript
JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles....

VBScript
VBScript
VBScript is an Active Scripting language developed by Microsoft that is modeled on Visual Basic. It is designed as a “lightweight” language with a fast interpreter for use in a wide variety of Microsoft environments...

PHP
PHP
PHP is a general-purpose server-side scripting language originally designed for web development to produce dynamic web pages. For this purpose, PHP code is embedded into the HTML source document and interpreted by a web server with a PHP processor module, which generates the web page document...

 Scripts
Python
Python (programming language)
Python is a general-purpose, high-level programming language whose design philosophy emphasizes code readability. Python claims to "[combine] remarkable power with very clear syntax", and its standard library is large and comprehensive...

Regular expression
Regular expression
In computing, a regular expression provides a concise and flexible means for "matching" strings of text, such as particular characters, words, or patterns of characters. Abbreviations for "regular expression" include "regex" and "regexp"...

s
Java
Java (programming language)
Java is a programming language originally developed by James Gosling at Sun Microsystems and released in 1995 as a core component of Sun Microsystems' Java platform. The language derives much of its syntax from C and C++ but has a simpler object model and fewer low-level facilities...

Other (specify)
Alpine any
Citadel
Citadel/UX
Citadel/UX is a collaboration suite that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD...

Claws Mail
Claws Mail
Claws Mail is a free, GTK+-based, open source email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin...

account
folder
Cone
Cone (software)
Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer"....

Courier
eM Client
EM Client
eM Client is a Windows-based Communication Client for managing E-mail, calendars, contacts and tasks. It contains integrated Instant Messaging for XMPP and Skype integration....

Elm
Eudora any
Eureka Email
Eureka Email
Eureka Email is an e-mail client. It has many features not found in other e-mail clients .-History:Eureka Email began as a project of Sean O' Connor in mid 2002. He finally wrote the program and was available for download in November of that year. Updates were frequent at first, but began to...

Gnus
Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail.Gnus blurs the distinction between news and e-mail, treating them both as "articles" that come from different sources. News articles are kept separate by group, and e-mail can be...

GroupWise
i.Scribe / InScribe
Scribe Mail
i.Scribe is a portable and cross-platform e-mail client for Microsoft Windows, Linux and Mac OS X with some PIM functionality.Scribe comes in a freeware version: i.Scribe, which is limited to one account and 5 user defined filters and a commercial version: InScribe...

any
IBM Lotus Notes http://publib.boulder.ibm.com/infocenter/domhelp/v8r0/index.jsp?topic=/com.ibm.help.domino80x.doc/DOC/H_CREATE_A_RECOGNIZER_OVER.html
KMail none
Mail
Mail (application)
Mail is an email program included with Apple Inc.'s Mac OS X operating system. Originally developed by NeXT as NeXTMail, a part of their NeXTSTEP operating system, it was adapted, following Apple's acquisition of NeXT, to become OS X's Mail application.Mail uses the SMTP, POP3, and IMAP protocols,...

Mac OS 10.5 (Leopard)
Microsoft Entourage
Microsoft Entourage
Microsoft Entourage was an e-mail client and personal information manager developed by Microsoft for Mac OS 8.5 and higher. Microsoft first released Entourage in October 2000 as part of the Microsoft Office 2001 office suite; Office 98, the previous version of Microsoft Office for Mac OS included...

Microsoft Office Outlook
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups
Mozilla Mail & Newsgroups is an e-mail and news client that is part of the Mozilla Application Suite....

Mozilla Thunderbird
Mozilla Thunderbird
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser...

profile
Mulberry
Mutt any
Netscape Messenger
Netscape Messenger 9
Netscape Messenger 9
Netscape Messenger is a standalone, multiplatform e-mail and news client that was developed by Netscape. Announced on June 11, 2007 as Netscape Mercury, the program was intended to accompany the web browser Netscape Navigator 9, and was based on Mozilla's Thunderbird.The original name Mercury was...

nmh / MH
MH Message Handling System
The MH Message Handling System is a free, open source e-mail client. It is different from almost all other mail reading systems in that, instead of a single program, it is made from several different programs which are designed to work from the command line provided by the shell on Unix-like...

Novell Evolution
Novell Evolution
Evolution or Novell Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions. It has been an official part of GNOME since version 2.8 in September 2004...

Opera Mail none
Outlook Express
Outlook Express
Outlook Express is an email and news client that is included with Internet Explorer versions 4.0 through 6.0. As such, it is also bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9...

Pegasus Mail
Pegasus Mail
Pegasus Mail is a donationware , proprietary, email client that is developed and maintained by David Harris and his team. It was originally released in 1990 for internal and external mail on Netware networks with MS-DOS clients, and was subsequently ported to Microsoft Windows...

Pine any
Pocomail
Pocomail
Pocomail is an e-mail client that was first developed by Poco Systems in 1999. It was originally designed to provide better spam and attack protection by using its own scripting methods as opposed to using JavaScript and native Microsoft scripting.Pocomail was awarded the PC Magazine Shareware...

SeaMonkey
SeaMonkey
SeaMonkey is a free and open source cross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code...

 Mail & Newsgroups
SquirrelMail
SquirrelMail
SquirrelMail is an Open Source project that provides both a web-based email application and an IMAP proxy server.The webmail portion of the project was started by Nathan and Luke Ehresman in 1999 and is written in the PHP scripting language...

Sylpheed
Sylpheed
Sylpheed is an open source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD as well as on Mac OS X and Windows. It uses...

The Bat account
folder
address book group
contact
Turnpike
Turnpike (software)
Turnpike is a British-developed software suite for Microsoft Windows, originally written by Chris Hall and Richard Clayton . The suite, which comprises a combined email and news client as well as a separate program for handling the Internet connection aspects, first appeared in 1995...

Windows Live Mail
Windows Live Mail
Windows Live Mail is a free of charge email client from Microsoft's Windows Live set of products. It is intended to be a successor for Outlook Express on Windows XP and Windows Mail on Windows Vista...

Windows Mail
Windows Mail
Windows Mail is an email and newsgroup client included in Windows Vista, that was superseded by Windows Live Mail. It is the successor to Outlook Express. Microsoft previewed Windows Mail on Channel 9 on October 10, 2005....

YAM
YAM (Yet Another Mailer)
YAM is a MIME-compliant e-mail client written for AmigaOS based computers. It supports multi-POP3, APOP, SMTP, TLSv1/SSLv3, multiple users, PGP, unlimited hierarchical folders, filters, a configurable GUI and an ARexx interface and many other features which are common for Mail User Agents ...

Zimbra
Zimbra
Zimbra Collaboration Suite is a groupware product created by Zimbra, Inc., located in Palo Alto, California, USA. The company was purchased by Yahoo! in September 2007, and subsequently purchased by VMware on Tuesday, January 12, 2010. The software consists of both client and server components...

any
Client Message templates Message templates individual for Support in message templates scripts, programming languages
new reply forward read confirmation save print JavaScript
JavaScript
JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles....

VBScript
VBScript
VBScript is an Active Scripting language developed by Microsoft that is modeled on Visual Basic. It is designed as a “lightweight” language with a fast interpreter for use in a wide variety of Microsoft environments...

PHP
PHP
PHP is a general-purpose server-side scripting language originally designed for web development to produce dynamic web pages. For this purpose, PHP code is embedded into the HTML source document and interpreted by a web server with a PHP processor module, which generates the web page document...

 Scripts
Python
Python (programming language)
Python is a general-purpose, high-level programming language whose design philosophy emphasizes code readability. Python claims to "[combine] remarkable power with very clear syntax", and its standard library is large and comprehensive...

Regular expression
Regular expression
In computing, a regular expression provides a concise and flexible means for "matching" strings of text, such as particular characters, words, or patterns of characters. Abbreviations for "regular expression" include "regex" and "regexp"...

s
Java
Java (programming language)
Java is a programming language originally developed by James Gosling at Sun Microsystems and released in 1995 as a core component of Sun Microsystems' Java platform. The language derives much of its syntax from C and C++ but has a simpler object model and fewer low-level facilities...

Other (specify)


See also

  • Unicode and email
  • List of personal information managers
  • Comparison of layout engines
    Comparison of layout engines
    The following tables compare general and technical information for a number of web browser engines. Please see the individual products' articles for further information. This article is not all-inclusive or necessarily up to date...

  • Webmail
  • Comparison of feed aggregators
    Comparison of feed aggregators
    The following is a comparison of notable RSS feed aggregators. Often e-mail programs and web browsers have the ability to display RSS feeds. They are listed here, too.Many BitTorrent clients support RSS feeds for broadcatching ....

  • Comparison of mail servers
    Comparison of mail servers
    This is a comparison of mail servers: mail transfer agents, mail delivery agents, and other computer software which provide e-mail services.- Feature comparison :- Authentication :- Antispam Features :...

  • Comparison of webmail providers
    Comparison of webmail providers
    The following tables and gallery compare general and technical information for a number of webmail providers. Please see the individual products' articles for further information.- General information :...


External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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