Yahoo! Mail is a web mail service provided by Yahoo!

Yahoo!

Yahoo! Inc. is an American multinational internet corporation headquartered in Sunnyvale, California, United States. The company is perhaps best known for its web portal, search engine , Yahoo! Directory, Yahoo! Mail, Yahoo! News, Yahoo! Groups, Yahoo! Answers, advertising, online mapping ,...

. It was inaugurated in 1997, and, according to comScore

ComScore

comScore is a Internet marketing research company providing marketing data and services to many of the Internet's largest businesses. comScore tracks all internet data on its surveyed computers in order to study online behavior....

, Yahoo! Mail was the second largest web-based email service with 273.1 million users as of November 2010.

Currently, Yahoo! offers three versions of Yahoo! Mail. The traditional "Yahoo! Mail Classic" continues the availability of the original interface introduced in 1997. A new version introduced in 2005 included a new Ajax

Ajax (programming)

Ajax is a group of interrelated web development methods used on the client-side to create asynchronous web applications...

 interface, drag-and-drop, improved search functionality, keyboard shortcuts, address auto-complete, tabs, and more.