A catch-all functionality that is enabled for a specific e-mailbox will allow you to receive emails that are sent to email addresses that do not actually exist. In other words, if you remove an email address and somebody still sends an email to it, or to any miswritten email address under the same domain, you’ll receive the message in the catch-all mailbox. Using this feature implies that you won’t miss an email for any reason, which could be essential if you are running some company, for example. Since you may begin receiving spam emails, you can use the catch-all option with anti-spam filters so as to receive only real emails in your inbox. Only one mailbox per domain can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.