A catch-all feature that is enabled for a particular e-mailbox will permit you to receive emails that are sent to addresses that do not really exist. Otherwise said, if you deactivate an email address and someone still sends an email message to it, or to any miswritten address under the exact same domain name, you will receive the email in the catch-all mailbox. Using this functionality implies that you won’t miss an email for any reason whatsoever, which could be essential if you are running some business, for instance. Since you may begin receiving spam emails, you can combine the catch-all functionality with anti-spam filters so as to receive only real emails in your inbox. Only one mailbox per domain can be a catch-all one and email forwarding cannot be activated for a catch-all mailbox.