Good morning All, I changed my SMTP (25) to SMTPD (587). Now ISPconfig 3 says that SMTP is offline, because i think it is still looking for port 25. Where can I change this value? Greetz, Marvin
You should always have smtp listening on port 25. So instaed of changing smtp port to 587, you edit the postfix master.cf file and remove the # in front of the line that starts with "submission". Additionally you have to undo your other port change then. In case you dont eant that someone connects to port 25 from external sources, close port 25 in the firewall.
