Eudora!
Do you remember Eudora? I do. It used to be the standard for e-mail.
Guess what? It's back!
http://wiki.mozilla.org/Penelope_Releases
It's built on Mozilla Thunderbird though, and is pretty much just some different graphics on the buttons. I think I'll stick with Thunderbird (GUI), SquirrelMail (Web), and mutt (CLI).
