Yahoo Mail

Yahoo! Mail (shortened to Y! Mail) is a free web mail service provided by Yahoo!. It was inaugurated in 1997. According to comScore, Yahoo! Mail is the second largest web-based e-mail service with 273.1 million users as of November 2010.^[1]
Currently, Yahoo! offers two versions of Yahoo! Mail: an Outlook-like Ajax interface based upon code the company acquired from Oddpost in 2004, as well as the traditional full-page-scroll "Yahoo! Mail Classic," which continues the availability of the simpler 1997-2006 interface for the brand's considerable installed base of users. In early 2008, Yahoo! started offering unlimited mail storage to its users, in response to heated competition in the free-web mail market segment.^[2]

On June 27, 2009, Yahoo! Messenger was integrated with Yahoo! Mail Beta.^[3] This means that Messenger and Mail are together in one place, allowing users to connect instantly with others who are online, switch between e-mail and chat, with no download or setup required. This new feature is now available for Mail Classic.