Log into SmarterMail as the master admin or domain administrator account.
Right-click the domain for which you wish the change the IP address.
Click the drop-down arrow next to IP Address
Select the desired IP address.
Click Protocol Settings in the left pane.
Click the SMTP Out tab.
Ensure the drop-down next to Outbound IP is set to Use Domain’s IP Address.
If you need any assistance with this process, or encounter any issues, please don’t hesitate to contact our Technical Support Department.