A catch-all functionality that is activated for a certain email 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 someone still sends a message to it, or to any mistyped address under the exact same domain name, you will get the message in the catch-all mailbox. Using this feature implies that you won’t miss an email for any reason whatsoever, which could be essential if you run a business, for example. Since you may begin receiving spam, you can combine the catch-all feature with anti-spam filtering software in order to receive only legitimate emails 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.