A catch-all mailbox receives email messages sent to nonexistent addresses under the very same domain name. For instance, an email message sent to the miswritten 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 emails from colleagues or clients who may have sent a message to your email address with a typographical error or to an old one, which they may still have, but you have already deleted. Just one mailbox per domain can be a catch-all one and email forwarding cannot be enabled for such a mailbox. The latter is due to the fact that at some point you may begin receiving spam email messages in the catch-all mailbox and the forwarding restriction means that the spam will not be sent to a third-party mailbox.