To answer the original question, the following email clients are available for Windows:

Outlook (Express)
Netscape / Mozilla
The Bat
Eudora
Becky
Datula
Sylpheed / Sylpheed-claws
Opera
Mutt
Pine
Pegasus
Emacs

I just copied and pasted this from http://linuxshop.ru/linuxbegin/win-l...en/table.shtml