A catch-all functionality that is activated for a certain e-mailbox will permit you to receive email messages that are sent to email addresses that do not actually exist. Otherwise put, if you delete an email address and somebody still sends an email to it, or to any misspelled email address under the exact 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 essential if you run a business, for instance. Since you may start receiving unsolicited bulk email messages, you can use the catch-all option with email filters so as to receive only legitimate email messages in your inbox. Just one single mailbox per domain name can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.