A catch-all feature that is enabled for a given email mailbox will permit you to receive emails that are sent to email addresses that do not actually exist. To state it differently, if you remove an email address and someone still sends a message to it, or to any misspelled address under the very same domain, you will receive the email in the catch-all mailbox. Using this functionality means that you won’t miss an email for any reason, which could be crucial if you run some company, for example. Since you may begin receiving unsolicited email messages, you can combine the catch-all option with anti-spam filters in order to get only authentic emails in your inbox. Only one single mailbox per domain name can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.