Step 1. Login to cPanel.
Step 2. Select the desired domain from the menu.
Step 3. Select one of the following options under Configure Email Routing.
1. Local Mail Exchanger — The lowest numbered mail exchanger points to an IP address on this server.
2. Backup Mail Exchanger — The lowest numbered mail exchanger points to an IP address not on this server.
3. Remote Mail Exchanger — No mail exchangers point to an IP address on this server.
Step 4. Click Change.