A catch-all feature that is activated for a given e-mailbox will permit you to receive email messages that are sent to addresses that do not really exist. Otherwise stated, if you delete an email address and someone still sends a message to it, or to any mistyped email address under the exact same domain, you’ll get the email in the catch-all mailbox. Using this functionality means that you will no longer miss an email for any reason whatsoever, which could be vital if you run some business, for example. Since you may begin receiving spam messages, you can use the catch-all option with anti-spam filtering software so as to get only authentic messages in your inbox. Just one mailbox per domain can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.