A catch-all feature that is enabled for a specific email mailbox will permit you to receive email messages that are sent to addresses that do not actually exist. In other words, if you remove an email address and somebody still sends a message to it, or to any mistyped email address under the very 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 whatsoever, which could be crucial if you are running a company, for instance. Since you may start receiving junk emails, you can combine the catch-all option with anti-spam filters in order to receive only legitimate emails in your inbox. Only one single mailbox per domain can be a catch-all one and email forwarding cannot be enabled for a catch-all mailbox.