Defined in 1998, the 418 error code should be returned by teapots requested to brew coffee. Sometimes, this status code is used as a response to an unknown source calling a web server (website) something it's not. Typically, a scammer or phishing email might combine your organization's domain name with another's to try to fool you. For example: "[your domain name].zip", causing your "click" to go to https://com.zip (when your domain name ends in '.com'), or https://org.zip (when your domain name ends in '.org'). Returning this "418" should enable your organization to configure their anti-spam software to easily block messages where included URLs like this return such error codes.