[CentOS] Recommend Mail Server

> An IP stack which is part of the kernel *is* (more or less) directly 
> exposed to the internet as long as there's the appropriate cable 
> connected to that machine.

Yes, I hope that IP-stack is not so buggy. Anyway, I think that is 
easier to exploit systems via normal tcp connection as the kernel ip stack.

Anyway, I think that unprotected sshd is bigger risk than postfix or 
sendmail. Personally I cannot trust sendmail, so I am running postfix on 
most of mailiservers.

--
Eero