Originally Posted by veremchook
[root@xxx ~]# nc -v 127.0.0.1 25
Connection to 127.0.0.1 25 port [tcp/smtp] succeeded!
220 xxx ESMTP Postfix
421 4.4.2 xxx Error: timeout exceeded
Yap like a said the problem is not a postfix problem it is a networking problem to do with either your routing, port forwarding or firewalling.