Email marketing is a term that sounds pretty simple, and is popular with nearly every business. But email marketing is much more than just sending a mass email promoting your product or event to every living soul in your inbox. In order for email marketing to be successful, you need to understand the most effective way to use it. Otherwise, it’s not only a waste of time, but it can also have negative consequences; if you’re doing it incorrectly you are probably annoying your customers.