When Tim Berners Lee created the first HTML code, he had no idea how important the Internet would become. Originally created by scientists at the Cern Hadron collider to share technical data, emails have now become the single most popular use of Internet technology. That sharing of information by the original scientists has now become a global phenomenon that has people checking their inboxes several times a day to see if they've 'got mail'. It's a business opportunity going begging. Which is exactly why an email marketing campaign works.