[CentOS] Not receiving mail

> No the example above  shows a telnet to port 25 connecting - which I can 
> reproduce too - but there  is no 220 response as there should be from a 

I am late to the thread (and I haven't a clue what we are talking about in 
fact), but I get a 220 when I telnet into that IP address...

Escape character is '^]'.
220 mercury.localdomain ESMTP Postfix