A catch-all feature that is enabled for a certain e-mailbox will allow you to receive emails that are sent to addresses that do not actually exist. Otherwise stated, if you deactivate an email address and somebody still sends an email to it, or to any misspelled email address under the very same domain name, you will get the email in the catch-all mailbox. Using this functionality implies that you will no longer miss an email for any reason, which could be vital in case you run a company, for instance. Since you may begin receiving spam email messages, you can use the catch-all option with anti-spam filtering software so as to receive only real emails in your inbox. Only one single mailbox per domain can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.