A catch-all feature that is enabled for a specific e-mailbox will permit you to receive emails that are sent to addresses that do not really exist. Otherwise put, if you deactivate an email address and somebody still sends an email to it, or to any misspelled address under the same domain name, you’ll receive the email in the catch-all mailbox. Using this feature means that you will no longer miss an email for any reason, which could be crucial in case you run some company, for example. Since you may start receiving junk emails, you can use the catch-all feature with anti-spam filters in order to receive only legitimate messages in your inbox. Just one mailbox per domain name can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.