A catch-all feature that is enabled for a certain email mailbox will allow you to receive email messages that are sent to email addresses that do not actually exist. Otherwise stated, if you delete an email address and somebody still sends a message to it, or to any misspelled address under the very same domain name, you’ll get the email in the catch-all mailbox. Using this functionality implies that you will no longer miss an email for any reason, which could be crucial in case you are running a business, for instance. Since you may start receiving junk email messages, you can use the catch-all feature with email filters in order to get only legitimate emails in your inbox. Just one single mailbox per domain can be a catch-all one and email forwarding cannot be enabled for a catch-all mailbox.