There’s a big difference between simply sending out a newsletter and sending out a newsletter that employs best practices. The latter requires a lot of time and thoughtful planning while the former might not. The main differentiating factor is, of course, the success rate of each.   The benchmarks for a newsletter’s success vary from industry to industry, and the traction achieved is dependent on a variety of factors. Mail Chimp, one of the leaders in e-mail marketing, sends out billions...