So, not to ask the obvious question here, but what do the logs say? org/mailman/listinfo/centos Logs for my dovecot and postfix seems to be ok. Sending is not a problem so it means my Postfix works well. My receiving services is the problem. Cant find any error logs on my mail server.
Iptables rules getting in the way? anything unusual in /var/log/messages?
-- "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety'' Benjamin Franklin 1775