Can you telnet to the public address port 25 when on that box? Ideally you should have DNS configued so that postfix and the like use the local/internal IP and not the public/external one. If you can't telnet to port 25 on the public IP and the messages are queued for that IP then there is a problem. Need to either have postfix use the intenal IP (DNS config) or fix your network so you can telnet to port 25 on the public IP. |