A catch-all email mailbox receives messages sent to nonexistent email addresses under the very same domain. For example, an email message sent to the miswritten email@example.com will go to firstname.lastname@example.org if the catch-all feature has been activated for the latter. In this way, you can receive email messages from acquaintances 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. Just one single mailbox per domain name can be a catch-all one and email forwarding cannot be enabled for such a mailbox. This is so because of the fact that at a certain moment you may begin receiving spam email messages in the catch-all mailbox and the forwarding limitation implies that the spam will not be re-sent to a 3rd-party mailbox.