SMTP Port

This setting defines the TCP/IP port, which ListManager listens on for incoming mail. By default, this setting uses port 25 that is the Internet standard for receiving SMTP mail.

In some situations, you may want to move the ListManager SMTP service to another port. Perhaps you already have a service on port 25, and you do not want the services to conflict over the port assignment. In such a case, you will need to configure your mail system so that the mail that ListManager should get is forwarded on to ListManager at its port. For instance, you might create an alias (a DNS CNAME) for ListManager mail, and inform your mail system that mail addressed to this alias should be passed on to ListManager on this port assignment.

Note: If you change this port number, and don't work out an alternate way for ListManager to get its mail, ListManager will no longer be able to receive mail, and any mail sent to it from the outside will not reach it.