Could Comodo be stopping Thunderbird automatically checking for mail?

I recently downloaded Comodo 3.8.65951.477 and it seems great. Just wondering, I have Tbird set to automatically check for new mail every 10mins, but it never does. It used to do it on my other lappie before I installed Comodo, so thought it might have been a setting somewhere.
Can anyone tell me if that is a possible explantion and, if so, how to fix it? Thankyou.

Did you check firewall configuration? is Thunderbird allowed to connect to internet?I have to check it myself.

Hmmm…think that setting looks OK. And it is letting it through manually ie when I hit “Get Mail”.