A catch-all functionality that is enabled for a particular e-mailbox will permit you to receive email messages that are sent to addresses that do not really exist. Otherwise stated, if you delete an email address and somebody still sends an email to it, or to any misspelled address under the same domain name, you’ll get the message in the catch-all mailbox. Using this functionality implies that you will no longer miss an email for any reason, which could be crucial if you are running a company, for instance. Since you may begin receiving spam emails, you can combine the catch-all option with anti-spam filtering software in order to receive only real email messages in your inbox. Just one single mailbox per domain name can be a catch-all one and email forwarding cannot be enabled for a catch-all mailbox.