Problem with BitDefender 8 & sending e-mail

Over the weekend, I found that I could no longer receive e-mails, although I could still send them. It took me ages to figure out that it was a Look 'n' Stop firewall rule that was causing the problem but eventually it said something about the signature of my BitDefender 8 (virus scanner) having changed. Has anyone else had any similar problems? I'm sorry but I don't have any further details as I was so fed up with trying to get things working again that I just OK'd the message that Look 'n' Stop popped up without studying it too closely (I do remember that I had been going through the applications list, changing red dots to green one at a time to try to identify the rule causing the problem).

 

the problem could be related to the fact that you might have not approved the signature change.