A catch-all functionality that is activated for a particular email mailbox will allow you to receive email messages that are sent to addresses that do not really exist. In other words, if you disable an email address and somebody still sends an email to it, or to any mistyped address under the very same domain name, you’ll receive the email in the catch-all mailbox. Using this functionality means that you will no longer miss an email for any reason, which could be essential if you are running some company, for example. Since you may begin receiving junk messages, you can use the catch-all option with anti-spam filters in order to receive only authentic emails in your inbox. Only one mailbox per domain name can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.