A catch-all functionality that is enabled for a specific email mailbox will allow you to receive emails that are sent to addresses that do not actually exist. Otherwise put, if you deactivate an email address and someone still sends a message to it, or to any mistyped email address under the exact same domain, you’ll receive the email in the catch-all mailbox. Using this functionality means that you won’t miss an email for any reason whatsoever, which could be vital in case you are running a business, for example. Since you may start receiving unsolicited messages, you can combine the catch-all option with email filters so as to get only authentic messages in your inbox. Just one mailbox per domain name can be a catch-all one and email forwarding cannot be enabled for a catch-all mailbox.