Problem

How to use an alternate SmartHost SMTP port in MS Exchange 2007, 2010, 2013, 2016 and 2019
How do I change SMTP port on a Exchange 2007, Exchange 2010, Exchange 2013, Exchange 2019 SmartHost?
How do I change SMTP port on a Exchange 2019 SmartHost?

Solution

Follow the guide below to configure Microsoft Exchange 2007 (or later) SmartHost using a different port. In the example below port 587 is used.

This article already assumes your exchange system is able to send emails externally and therefore a Send Connector has already been created and configured correctly on the Hub Transport Server.

1. Open Exchange Management Shell
   Start -> Programs -> Microsoft Exchange Server -> Exchange Management Shell
2. Type the following
   
   Set-SendConnector -Identity "All Outbound" -port 587
   
   or the following if your connector is called something else from the default
   
   Set-SendConnector -Identity "SENDCONNECTORNAME" -port 587

Note

By Default the "Send Connector" is called "All Outbound" unless you have changed it or added additional connectors. To determine this you can type the following at the Exchange Management Shell

Get-SendConnector