Can not receive emails on Thunderbird anymore

I am using Mozilla Thunderbird as email client. Have multiple email acounts on Thunderbird. Approx. 5 days ago stopped receiving emails (inbox) on 2 accounts but can get them normally on other accounts. Tried everything on Mozilla Support Page: archiving emails, compacting folders, creating a new account, reinstalling Thunderbird, deleting the profile, reinstalling the profile, running windows 7 (64 bit) in safe mode, running antivirus, malware,....so far nothing worked. The only thing that happens is when I open Thunderbird it says inbox full. Unfortunately it doesn't say on which email account. When I hit send/receive emails again Thunderbird connects to the server...i get new message from 3 accounts from 5 of them. If someone knows Thunderbird please let me know