Mutt, of course: http://www.mutt.org/
Sylpheed: http://sylpheed.good-day.net/
Thunderbird: http://www.mozilla.org/products/thunderbird/
Others: Evolution, Aileron, ["KMail"]....
Mutt, of course: http://www.mutt.org/
Sylpheed: http://sylpheed.good-day.net/
Thunderbird: http://www.mozilla.org/products/thunderbird/
Others: Evolution, Aileron, ["KMail"]....