A catch-all functionality that is activated for a given email mailbox will permit you to receive emails that are sent to addresses that do not really exist. Otherwise stated, if you remove an email address and someone still sends an email message to it, or to any misspelled email address under the same domain, 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 essential if you run some company, for example. Since you may start receiving unsolicited bulk messages, you can combine the catch-all option with anti-spam filtering software in order to receive only real 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.