A catch-all functionality that is enabled for a certain e-mailbox will permit you to receive emails that are sent to addresses that do not really exist. To state it differently, if you deactivate an email address and someone still sends an email to it, or to any misspelled address under the very same domain name, you’ll get the email in the catch-all mailbox. Using this functionality implies that you won’t miss an email for any reason, which could be vital if you run a company, for example. Since you may start receiving unsolicited bulk emails, you can use the catch-all option with anti-spam filtering software in order to get only legitimate email messages 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.