If you want open source antivirus, you can only use ClamAV.
Anyway there are a number of free or commercial antivirus solutions for Linux. (I don't know if any of these supports Thunderbird).
http://www.linux.com/articles/22899
This is a good article about antivirus solutions. You can use ClamAV along with Sylpheed(Claws) because it has integration for it.
Bye, Gyuszk
I am currently using the clamv anti-virus program. I was wondering if there is a better one for Gentoo, especially one that integrates well with Thunderbird. That has been my one disappointment with clamav. Not necessarily clamav's fault since T/B maintains its emails in one long file.
Tony
--
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
-- Benjamin Franklin