Originally Posted by till
If noone needs to connect to the mailserver from external IP's, then close port 25 in the firewall. If you want to change or add a additional listen port, then edit postfix master.cf
I've tried to add an additional port and block port 25 in my server.... i can add for example 27 port, but i can't connect to it...
This problem is getting me mad!
"from=<email@example.com> to=<firstname.lastname@example.org> proto=SMTP helo=<213-224-29-62.iFiber.telenet-ops.be>
NOQUEUE: reject: RCPT from unknown[myIP]: 451 4.3.5 <unknown[myIP]>: Client host rejected: Server configuration error; from=<email@example.com> to=<firstname.lastname@example.org> proto=SMTP helo=<static-200-105-212-110.acelerate.net> "