You have a way to set up your Mail service to deal with mail that comes for users who do not exist on your domain(s). There are two available ways of handling such mail: to bounce a letter with a certain message or to redirect (catch) all such mail to a specified email address.
- Click on the Mail menu > Catch-All Configuration in the navigation menu. By default the catch-all possibility is disabled.
- Click Edit to enable and configure the Catch-All feature. The Catch-All Configuration page provides the options of setting up the way of handling the mail for the non-existent users.
- Bounce with phrase. Select this option to reply with a specific message. If you selected Bounce with phrase, enter the text to appear in the reply message in the text input box.
- Forward to address. Select this option to redirect mail to a specified email address. If you selected Forward to address, enter the email address where all mail will be sent.
- Click Submit to save the settings.