How-To: Create A Secondary Inbound SMTP Port

Last Updated for InterWorx version 3.0.1

No special prerequisites.

Since many ISP‘s today are blocking access to port 25 (the default SMTP port) on any mail severer but their own as an anti-spam measure, clients of those ISP‘s are required to send email through the ISP‘s mail servers exclusively. However, when the sending server’s domain and the domain of the sender’s email address do not match, these emails tend to get caught in other anti spam measures and are rejected.

1. Click on the System Services menu if it is not already expanded.
2. Click on the ♦    Mail Server submenu if it is not already expanded.
3. Click on the      ◊    MTA Settings item.
4. You should now be looking at the Mail Server Management :: MTA controls in the main content area.
5. Locate the Alternate Inbound SMTP Server section.
6. Type the desired port (default 587)
7. Click the Start button.

1. Click on the Server menu if it is not already expanded.
2. Click on the ♦    Firewall item.
3. You should now be looking at the Firewall controls in the main content area.
4. Locate the Port Access section.
5. Type 587 (or the port you just created) in the port field.
6. Select Open from all 4 drop down menus.
7. Click the Add button.