Buying email lists doesn't just damage your deliverability and brand reputation -- it can also put your email account at risk. Email clients like Gmail, Yahoo!, and Outlook don't want to be associated with accounts that recipients repeatedly flag as spam. Email service providers like AWeber go as far as immediately closing your account if it suspects you're sending unwanted content.
So what is an email newsletter anyway? An email newsletter is very much the same thing as a traditional newsletter, the only difference is that it is transmitted to the consumer through the use of email. The business obtains a list of potential consumers that may be interested in their service, they create a newsletter for that group, and then they send the mass email out to all of these people.
The books I've written have actually had three different titles, updated to move with the times. My first text book was titled: Internet Marketing: Strategy, Implementation and Practice. I then created E-business E-commerce Management and, with PR Smith, E-marketing Excellence, for professionals a couple of years later. Then, much later, the names switched and in 2012 we renamed the Internet Marketing book to Digital Marketing with the others becoming Digital Business and Digital Marketing Excellence. About time too, since I was involved in developing the syllabus as an examiner for the first IDM Diploma in Digital Marketing back in 2004-5 when the term was hardly used at all - so it's been great to see 'Digital Marketing' adopted as the 'de facto' term, when I was first involved in defining it with the IDM students in 2004!
Julie Ewald recommends moving away from sending generic content to your whole email list via e-blast entirely. With a little elbow grease, you can utilize segmentation and start sending off tailored messages to each of your lists with content that’s relevant, valuable, and designed to resonate with the kind of recipients that make up each segment.