A catch-all feature that is enabled for a particular mailbox will permit you to receive email messages that are sent to addresses that do not really exist. Otherwise stated, if you deactivate an email address and someone still sends an email to it, or to any misspelled address under the same domain name, you will get the email in the catch-all mailbox. Using this feature implies that you won’t miss an email for any reason, which could be crucial in case you run some company, for instance. Since you may begin receiving junk emails, you can combine the catch-all functionality with email filters so as to receive only legitimate emails in your inbox. Only one mailbox per domain can be a catch-all one and email forwarding cannot be enabled for a catch-all mailbox.