About a week ago Thunderbird quit sending my incoming mail with the message of it times out therefore no new email. I checked with my internet server and made sure email was all ok they said a "timed Out" usually means anti-virus settings causing this. Checked this morning and anti virus is ok. Thought problem was solved, cleaned out mail as had lots in inbox. Now just tried again and doing the same thing. What could have changed the timing out and not getting mail downloaded?