A catch-all mailbox receives email messages sent to non-existent email addresses under the very same domain name. For instance, an email sent to the miswritten email@example.com will be delivered to firstname.lastname@example.org in case the catch-all feature has been enabled for the latter. In this way, you can get emails from partners 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 deleted. Only one mailbox per domain can be a catch-all one and email forwarding cannot be activated for such a mailbox. This is due to the fact that at some moment you may begin receiving spam email messages in the catch-all mailbox and the forwarding limitation implies that the spam will not be redirected to a third-party mailbox.