Step 1. Login to your plesk control panel and go to the website which you want to manage.
Step 2. Click on 'Mail' tab on the left panel.
Step 3. Click 'Mail settings' Tab.
Step 4. Select the domain name which you want to manage and click on 'Activate/Deactivate services' button.
Step 5. Modify the settings to enable/disable mail service, Mailing lists and DKIM spam protection and click 'OK' button.
