A catch-all functionality that is activated for a certain mailbox will permit you to receive email messages that are sent to email addresses that do not really 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, you’ll get the email 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 run some business, for example. Since you may begin receiving unsolicited email messages, you can combine the catch-all feature with anti-spam filtering software so as to get only real messages in your inbox. Only one single mailbox per domain name can be a catch-all one and email forwarding cannot be enabled for a catch-all mailbox.