Buying email lists aren’t allowed by reputable email marketing services Email marketing services, including Constant Contact, do not allow you to use purchased lists. That’s because we are an email service provider that maintains a strong anti-spam policy to ensure that our customers are only sending emails to people who have expressed interest in receiving them. And that means refraining from buying an email list.

Most of the article really talks about how to successfully get an email of a person who has already landed on your landing page/podcast page/affiliate/blog etc. but how to get those people there in the first place is a bigger challenge. Also, one of the ways you can include in your list is by offering free tools/widgets. For example, OpenSiteExplorer by Moz is a great example. Evergreen and very useful for the target audience.
Use personalization. Personalizing the content of your emails (depending on your segment from Chapter 3) will make it infinitely more relevant and valuable to them. Personalization is so much more than inserting your subscriber’s first name into the email. You need to tailor the actual content of the email to address their needs. For instance, an online retailer will find it much more valuable to read an email with the subject line, “How to build backlinks to your eCommerce store” than just a generic subject line, “How to build backlinks.”
If someone didn't ask to hear from you yet, it doesn't mean they won't want to hear from you later. It's your job to prove to them -- through helpful content and valuable offers -- that they should stay up to date with your company via email. If you force your email content on anyone too early, even if you know in your bones they're a great fit for your products or services, you risk preemptively losing their trust and their future business.
Particular groups of customers can be targeted or even individuals. Offering individual customers special deals on merchandise and/or services on the customer's birthday, for instance, is one example of email marketing personalization. (A restaurant might send an email to customers on their birthday offering 50% off an entree,) Email marketing helps a business develop and maintain a relationship with a customer over time that hopefully results in increased sales and increased customer loyalty. 
×