Setting Up Site-wide Preferences for Handling Mail to Nonexistent Users

When somebody sends an e-mail message to an e-mail address that does not exist under your domain, the mail server, by default accepts mail, processes it, and when it finds out that there is no such a recipient under the domain, it returns the mail back to sender with the "this address no longer accepts mail" notice. You can choose to:

To configure the site-wide settings for serving mail to nonexistent users:

  1. Go to Mail > Preferences.
  2. Choose a desired option and specify the information as required.
  3. Click OK.