While not making nearly the noise of its large brother Firefox, Mozilla Thunderbird is every bit as good. Reaching 1.0 not too long ago, this mail client is small and quick. I had been using Evolution+Razor+SpamAssassin, but recently perforance issues (ever try to use a Gnome app on the upstream of a Cable modem?) among other things caused me to explore other options. Before Evolution I was using the mail client that came with the full mozilla suite.

While getting the correct SMTP servers associated with the correct email address was a little annoying (the directions online use menu options and buttons that don't exist in 1.0), I am very pleased with the results. I get around 60 emails a day, and after 3 days Firefox is catching all of the spam, without needing to train it on a 60 meg file like Spamassassin. The interface is light and the firefox-like extensions are very cool.

People who liked the mozilla mail client, no longer use the full suite, and are looking for a mail client should check out Thunderbird.