A catch-all functionality that is enabled for a certain email mailbox will permit you to receive email messages that are sent to email addresses that do not actually exist. To state it differently, if you deactivate an email address and someone still sends a message to it, or to any misspelled address under the exact same domain name, you’ll receive the email in the catch-all mailbox. Using this feature implies that you will no longer miss an email for any reason, which could be essential if you run some business, for instance. Since you may start receiving junk emails, you can combine the catch-all feature with email filters in order to receive only legitimate emails in your inbox. Just one single mailbox per domain name can be a catch-all one and email forwarding cannot be activated for a catch-all mailbox.