Hello, Kim - I used Evolution for a couple months, but it didn't have 3 features that I required. So, I recently switched to Thunderbird; granted, there's no calendar/to-do feature, but it definitely suits my needs.
I get about 300 emails/day, and have 10 maillist filters. Seems quick enough. I haven't collected enough mail to say how it is with large directories.
Tom Horsley wrote:
(I especially like that it won't display html mail unless I go to a lot of trouble to install an html plugin, which I haven't done since I don't want to see that crap, and especially don't want to inform the spammers that I opened their mail because the html referenced some external link :-).
Thunderbird is really nice with that issue - by default, it won't load images unless the from: is in your address book!