Emails Bouncing - Please Help!!

Mon Apr 24 19:41:05 UTC 2006

Hi! I am on a bunch of mailing-lists (this one, kde-linux, and 
suse-linux-e), and I have gotten a message from each about my messages 
bouncing and my account being suspended. I use thunderbird 1.5.0.2 on 
FC5. I have almost 40,000 emails from June '04 saved. Could I have some 
sort of virus? Does linux GET viruses? I really don't want to be 
permanently canned from the lists, so could anyone help? Thanks!
-Steven