A catch-all email mailbox receives email messages sent to nonexistent email addresses under the very same domain name. 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 get email messages from buddies or clients who may have sent a message to your email address with a typo or to an old one, which they may still have, but you have already deactivated. Just one mailbox per domain 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 some point you may begin receiving spam email messages in the catch-all mailbox and the forwarding restriction implies that the spam will not be received in a third-party mailbox.