A catch-all functionality that is enabled for a particular e-mailbox will permit you to receive emails that are sent to addresses that do not really exist. To state it differently, if you disable an email address and somebody still sends an email message to it, or to any mistyped email address under the same domain name, you’ll receive the email in the catch-all mailbox. Using this feature means that you will no longer miss an email for any reason, which could be vital if you are running a business, for example. Since you may start receiving spam, you can combine the catch-all functionality with email filters so as to receive only authentic emails in your inbox. Just one single mailbox per domain name can be a catch-all one and email forwarding cannot be activated for a catch-all mailbox.