A catch-all email mailbox receives messages sent to nonexistent email addresses under the same domain name. For example, a message sent to the misspelled suport@domain.com will be delivered to support@domain.com in case the catch-all feature has been activated for the latter. In this way, you can receive messages from buddies or customers who may have sent a message to your email address with a typographical error or to an obsolete one, which they may still have, but you have already disabled. Just one single mailbox per domain name can be a catch-all one and email forwarding cannot be activated for such a mailbox. This is so because of the fact that at some moment you may begin receiving spam messages in the catch-all mailbox and the forwarding restriction implies that the spam will not be received in a 3rd-party mailbox.