José David Bravo Álvarez wrote: > Im using CentOS 5 with exim 4.63.
>
> I can do telnet localhost 25 and it works fine. But if I do telnet
> xxx.xxx.xxx.xxx 25 from Internet it refuse the conection. The server
> have not firewalls.
Verify if exim is actually listening on the external interface, for
example on a remote server do "nmap xxx.xxx.xxx.xxx". If it doesn't
report port 25 as open do the same on the local server, using your
external IP. If that reports the port to be open you're filtering
traffic. Change the filtering (check ipmasq for example, if you have
it). If it also reports port 25 as closed you have to tell exim to
listen to all interfaces.
