Even if you’ve already got a long list of emails for clients and prospects, you should never stop adding to it. Especially since it’s not nearly as hard as it sounds. For example, make sure your list is always growing passively with a signup feature on your website. Subscription forms should be on your home page, blog page and everywhere else you can fit it without taking away from more important content.
Based on all the information we have gathered during our in-depth research we assign a magic score to each vendor. This is based on factors that affect any solo ad purchase (for e.g: CPC, Sales, Conversion rate etc). We use our proprietary algorithm to do this. As a rule of thumb, higher the Magic Score, better the solo ad experience is going to be.
When it comes to deciding how to craft that perfect subject line, there appears to be really only one area to avoid: the subject line of 60 to 70 characters. Marketers refer to this as the “dead zone” of subject length. According to research by Adestra, which tracked over 900 million emails for its report, there is no increase in either open rate or clickthroughs at this 60-to-70 character length of subject line.