A catch-all functionality that is enabled for a particular e-mailbox will permit you to receive email messages that are sent to addresses that do not actually exist. To put it differently, if you delete an email address and somebody still sends an email to it, or to any mistyped email address under the same domain name, you will get the message 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 are running some business, for instance. Since you may begin receiving junk emails, you can combine the catch-all functionality with anti-spam filters in order to get only authentic email messages in your inbox. Just one mailbox per domain name can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.