Ever seen messages like: "Relaying Denied" or "Sorry, that domain isn't on my list of allowed domains"? This is because most ISP email servers are configured to only accept outgoing emails from known locations, so if you go somewhere, and try and send emails, your existing server will reject the message. By allowing authenticated email sending, we can allow the server to accept the message and pass it on for you. - This feature is part of the Email Server Module and was added to all our systems on 31st March 2006.