How do I change the port on MS Exchange 2010 SMTP Send Connector?
By default the SMTP Send Connector is set to use port 25 with a Smart Host. However if you need to change the port from port 25 to port 587 then follow the below instructions.
Launch the Exchange Management Shell (EMS).
Use the following command in the Exchange Management Shell to get the current Connector information.
To change the port to 587 use the following command
Set-SendConnector "Your SMTP Send Connector" -Port 587