A catch-all mailbox receives email messages sent to nonexistent addresses under the very same domain. For example, an email sent to the misspelled suport@domain.com will be delivered to support@domain.com in case the catch-all feature has been activated for the latter. Thus, you can receive email messages from pals or customers who may have sent a message to your email address with a spelling mistake or to an outdated one, which they may still have, but you have already disabled. Just one mailbox per domain can be a catch-all one and email forwarding cannot be set up 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 means that the spam will not be delivered to a third-party mailbox.