How do I enable catchall (default email address)?
1. Log in to your cPanel
2. In the Mail section, click Default Address
There you can set your catchall address. Here is a brief explanation of what it does:
The default email address will "catch" any mail that is sent to an invalid email address for your domain. All mail that is sent to an address that does not exist will go to the default email address. To send all default mail to the main mail account, simply type the user name of your cPanel account in the email address input field.