I use Thunderbird in both Windows and Linux and I think it's a faster and better mail client than Evo. In Thunderbird you can select which folder your trash mail should move to. If you need calendar support you can use Sunbird (
http://www.mozilla.org/projects/calendar/sunbird/ ) or Lightning (
http://www.mozilla.org/projects/calendar/lightning/download.html ).
" What's the difference between Sunbird and Lightning? "
Sunbird is our standalone calendar application. It doesn't need another client application to run at the cost of a larger download and higher memory requirements. Because of its standalone nature, Sunbird does not offer any kind of tight integration with an e-mail application, such as Mozilla Thunderbird.
Lightning is a calendar extension for Mozilla Thunderbird. It offers calendaring features directly in the Thunderbird User Interface. Further integration features, such as e-mail invites or address book integration are planned for future releases.
Regards, Tobias