Yahoo! Mail is free and comes with a great Address Book and Calendar. You can also use it with your mobile and Yahoo! Messenger. Or you can get Yahoo! Mail+ with 2GB storage and no graphical ads.
Full Specifications
What's new in version
General
ReleaseNovember 7, 2008
Date AddedJune 6, 2006
Operating Systems
Operating SystemsWebware
Additional RequirementsInternet Explorer 5.5, Netscape, Mozilla Firefox