Peter Cobb, the co-founder of online retailer eBags, shared some secrets about the company's email marketing program at the eCommerce Conference in Melbourne this week. For example, the company employs two employees dedicated to email marketing and that they send out 2.3 million emails a week to a database of 800,000 people. The company's program is fairly sophisticated as almost half of the emails they send are triggered automatically based on a customer's behavior on their website. Cobb also revealed that about a third of the company's email sales come from these automatic emails. Overall, eBags’ email program is responsible for a fifth of its sales, and the company makes an average of $14 for every single subscriber.