A catch-all functionality that is enabled for a certain email mailbox will permit you to receive emails that are sent to email addresses that do not actually exist. Otherwise put, if you deactivate an email address and someone still sends a message to it, or to any misspelled email address under the very same domain name, you’ll receive the message in the catch-all mailbox. Using this feature implies that you won’t miss an email for any reason, which could be vital in case you are running a company, for example. Since you may begin receiving spam messages, you can use the catch-all feature with email filters so as to receive only legitimate emails in your inbox. Just one mailbox per domain name can be a catch-all one and email forwarding cannot be enabled for a catch-all mailbox.