A catch-all mailbox receives messages sent to nonexistent addresses under the exact same domain name. For example, an email sent to the misspelled email@example.com will be delivered to firstname.lastname@example.org in case the catch-all feature has been activated for the latter. In this way, you can receive email messages from pals or customers who may have sent a message to your email address with a typographical error or to an out-of-date one, which they may still have, but you have already disabled. Only one mailbox per domain can be a catch-all one and email forwarding cannot be set up for such a mailbox. The latter is due to the fact that at a certain point you may begin receiving spam email messages in the catch-all mailbox and the forwarding limitation implies that the spam will not be sent to a third-party mailbox.