A catch-all email mailbox receives emails sent to inactive email addresses under the same domain. 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 enabled for the latter. In this way, you can get email messages from pals 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 single mailbox per domain name 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 point you may start receiving spam emails in the catch-all mailbox and the forwarding restriction means that the spam will not be redirected to a third-party mailbox.