A catch-all feature that is enabled for a particular 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 message to it, or to any mistyped address under the very same domain name, you’ll receive the message in the catch-all mailbox. Using this functionality implies that you won’t miss an email for any reason whatsoever, which could be vital if you are running some business, for example. Since you may start receiving unsolicited emails, you can combine the catch-all functionality with email filters so as to receive only legitimate messages in your inbox. Only one mailbox per domain name can be a catch-all one and email forwarding cannot be enabled for a catch-all mailbox.