If you don't need ALL your incoming mail, you can configure your mailbox to discard all incoming mail.
In this case senders won't receive 'undelivered mail' notifications.
1. Click the mailbox e-mail address in the E-mail list on the maildomain Controls page.
2. In the MAILBOX section check the Discard All Incoming Mail box.
3. Click the Submit button at the bottom of the form.
Article ID: 839, Created: March 15, 2011 at 3:35 PM, Modified: April 8, 2011 at 1:22 PM