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#### 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:

- Continue returning all such mail back to senders (Bounce or Bounce with message option),
- Forward all such mail to the specified e-mail address (Forward to address option),
- Forward all such mail to another mail server with the specified IP address (available only for Windows hosting) using the Redirect to external mail server with IP address option,
- Reject such mail without accepting it and without notifying senders (Reject option).

  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. Go to Domains > domain name > Mail group title menu > Mail Settings.
2. Select the required option and specify the information as required.
3. Click OK.