E-newsletters are a great and inexpensive tool for communicating with many different audiences, which makes them popular for communicating with current and prospective customers. E-newsletters and promotional emails alone make up about 62 percent of all emails sent, and e-newsletters specifically are projected to grow another 58 percent by 2013.* Amidst growing e-newsletter competition, you want to make sure to create and maintain a solid newsletter strategy to achieve long-term results.