A catch-all feature that is enabled for a given email mailbox will allow you to receive email messages that are sent to email addresses that do not actually exist. Otherwise said, if you deactivate an email address and somebody still sends an email to it, or to any misspelled email address under the exact same domain name, you will get the message in the catch-all mailbox. Using this functionality means that you won’t miss an email for any reason whatsoever, which could be crucial in case you run a company, for instance. Since you may start receiving unsolicited emails, you can combine the catch-all feature with anti-spam filters so as to receive only authentic emails 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.