A catch-all email mailbox receives messages sent to inactive email addresses under the same domain name. For instance, an email sent to the misspelled suport@domain.com will be delivered to support@domain.com in case the catch-all feature has been enabled for the latter. In this way, you can get emails from mates 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 mailbox per domain name 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 a certain moment you may begin receiving spam emails in the catch-all mailbox and the forwarding restriction implies that the spam will not be sent to a third-party mailbox.