On Mon, 18 Oct 2010, Dotan Cohen wrote: > Done! I then restarted postfix and there seem to be no new errors in > the logs. However, I still cannot telnet into port 25: > ✈dcl:~$ telnet mail.sharingcenter.eu 25 > Trying 178.63.65.136... > telnet: Unable to connect to remote host: Connection timed out > ✈dcl:~$ It works here (where here is on another continent) [herrold at stones herrold]$ telnet 178.63.65.136 25 Trying 178.63.65.136... Connected to 178.63.65.136. Escape character is '^]'. 220 mercury.localdomain ESMTP Postfix quit 221 2.0.0 Bye Connection closed by foreign host. [herrold at stones herrold]$ Something between your local setup and 178.63.65.136 is blocking you -- Solve that -- it is NOT a centos issue at this point -- Russ herrold