A catch-all feature that is activated for a specific mailbox will allow you to receive emails that are sent to addresses that do not really exist. Otherwise put, if you remove an email address and somebody still sends a message to it, or to any mistyped email address under the same domain, you will get the email in the catch-all mailbox. Using this feature implies that you won’t miss an email for any reason, which could be crucial in case you are running a company, for example. Since you may start receiving junk email messages, you can combine the catch-all option with email filters so as to receive only legitimate email messages in your inbox. Only one mailbox per domain name can be a catch-all one and email forwarding cannot be activated for a catch-all mailbox.