On Wed, Mar 13, 2013 at 5:57 PM, Austin Einter <austin.einter at gmail.com> wrote: >> > [root at ip-173-201-189-43 necs14]# > > I see in my firewall telenet/25 is blocked. > However smtp/25 is allowed. What does that mean? Both services use TCP. Telnet is normally port 23, SMTP is 25. I suggested 'telnet IP_address 25' as a quick way to see if tcp/25 is permiited. I can't connect now, though, so either postfix is not listening or there is a firewall somewhere. -- Les Mikesell lesmikesell at gmail.com