Plesk administrator can specify a custom email address to be used as a mail relay. The email address will be used as the sender address for all Plesk email notifications enabled in the Tools & Settings > Notifications menu.

To adjust the settings, perform the following:

1. Log into Plesk
2. Edit the Plesk panel.ini file by adding the lines below there:

   [notification]
   senderAddress=<custom email address>