### Setting Up Site-Wide Preferences for Handling Mail to Nonexistent Users (Mail Bounce)

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:

- Change the default notice if you do not like it,
- Forward all such mail to the desired e-mail address,
- Reject such mail without accepting it and without notifying senders.

  This setting can decrease mail server load caused by a large amount of spam, which is often sent to randomly generated user names. However, for spammers, this can somewhat speed up scanning your mail server for valid e-mail addresses.

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

1. Click the Domains shortcut in the navigation pane.
2. Click the required domain name in the list.
3. Click Mail.
4. Click Preferences.
5. Choose a desired option and specify the information as required.
6. Click OK.