This is the wife of Firefox

Did you knew that Thunderbird is superior that Outlook. Also its RSS feeds Reader (it also supports XML and Blogs) is turning heads over to Mozilla.org rather than looking for an Atom reader. If you have a Gmail account you can access your mail with it (if Gmail has given you POP access). All in all its a 11 in a scale from 1 to 10, as always supporting OpenSource.