This interface allows you to set up a default address (catch-all address) that receives any mail for an invalid email address for the domain. You can also define how the default address handles incoming messages.
The username and password of the default account is the same as your cPanel account login. The default account cannot be deleted and has no quota.
The following steps describe how to check this mailbox:
2) Select the link "Email Accounts".
3) Navigate to the bottom of the page where your "Default Email Account" is and click on "Access Webmail".
4) Once logged in you may view your current/undeliverable email messages by double clicking them.