The default email address* is where all emails sent to inaccessible, non-existent, incorrectly typed email addresses under your domain will go
To access the settings, go to "Email → Default Address "
Select in "Send all unsent mail to the next domain " domain and set one of the options
*"Delete email message while server is processing it by SMTP time, with error message "
- You can change the default sender message (No Such User Here) to your own text.
*"Forward to e-mail address "
- Create a mailbox in cPanel to which emails will be forwarded.
Clicking on the "Advanced Settings " link will show you options like this:
- Direct your system account user name cPanel.
- Conveyor to program.
- Delete (not recommended).