A catch-all functionality that is activated for a particular e-mailbox will allow you to receive email messages that are sent to email addresses that do not actually exist. In other words, 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 receive the email in the catch-all mailbox. Using this feature means that you will no longer miss an email for any reason whatsoever, which could be crucial in case you are running a business, for instance. Since you may begin receiving junk messages, you can combine the catch-all feature with email filters so as to get only authentic email messages in your inbox. Just one mailbox per domain can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.