A catch-all email mailbox receives messages sent to nonexistent addresses under the very same domain. For instance, an email sent to the mistyped firstname.lastname@example.org will be delivered to email@example.com if the catch-all feature has been enabled for the latter. In this way, you can get emails from buddies or clients who may have sent a message to your email address with a spelling mistake or to an out-of-date one, which they may still have, but you have already deleted. Only one 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 point you may start receiving spam email messages in the catch-all mailbox and the forwarding limitation means that the spam will not be sent to a 3rd-party mailbox.