I've been using Avast 5 on this computer for some time, along with Thunderbird 2, and no mail settings have changed. However, sometime between 3/5 and 3/6 Avast started blocking all incoming mail.
If I try to check my mail, Thunderbird immediately responds "An error occurred with the POP3 mail server. Mail server mail.steellite.com responded:"
If I disable the mail shield or turn off "Scan inbound messages" everything works.
I have updated Avast and restarted my system twice today trying to fix the problem, but no luck
Windows Vista Home Premium SP2 32-bit
Avast 5.0.462, definitions: 100309-0 (Updated today, after problem started)