A catch-all functionality that is activated for a certain email mailbox will allow you to receive email messages that are sent to addresses that do not really exist. Otherwise put, if you deactivate an email address and someone still sends an email message to it, or to any mistyped address under the same domain, you’ll receive the message in the catch-all mailbox. Using this feature means that you will no longer miss an email for any reason whatsoever, which could be vital if you are running some business, for instance. Since you may start receiving unsolicited bulk messages, you can combine the catch-all functionality with anti-spam filters so as to get only authentic messages in your inbox. Just one single mailbox per domain name can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.