A catch-all feature that is activated for a given mailbox will permit you to receive emails that are sent to addresses that do not really exist. Otherwise stated, if you disable an email address and someone still sends an email to it, or to any mistyped address under the exact same domain, you will get the email in the catch-all mailbox. Using this functionality implies that you won’t miss an email for any reason, which could be crucial in case you run a company, for example. Since you may begin receiving junk email messages, you can use the catch-all feature with email filters so as to receive only legitimate emails in your inbox. Only one single mailbox per domain can be a catch-all one and email forwarding cannot be enabled for a catch-all mailbox.