A catch-all feature that is enabled for a particular mailbox will allow you to receive email messages that are sent to addresses that do not actually exist. Otherwise said, if you remove an email address and someone still sends a message to it, or to any mistyped address under the same domain, you will receive the email in the catch-all mailbox. Using this feature implies that you won’t miss an email for any reason, which could be essential in case you are running a business, for instance. Since you may begin receiving unsolicited emails, you can combine the catch-all feature with anti-spam filtering software so as to get only legitimate messages in your inbox. Just one single mailbox per domain can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.