Catch All Email Alias:

This is a special email address when setup catches all emails that are sent to your domain name.  This feature, for example, allows you to receive emails sent to something@yourdomain.com (even if it does not exist), to a predefined e-mail address.  You can use this feature to make sure you receive each and every mail sent to your domain, even though if sender makes a typo in user-name section of the email address.