Improve your open rate by A/B testing your subject lines on unengaged subscribers.

The subject line is one of very few data points that a recipient sees when deciding whether or not to open your email. Increase your open rate by A/B testing each one with unengaged subscribers prior to sending.

Alex Garcia of Marketing Examined improved his open rate to ~46% — an increase of roughly 12%. One way he did this with his 15,000 subscribers was by A/B testing his subject lines before sending each email. He says this drastically improves open rates. So whether it's a newsletter or promotional content, consider creating a few different versions of your subject line and send them to a subset of your least-engaged subscribers. Wait and see which subject line performs best, then send that one to the rest of your (more engaged) subscribers. This ensures that your most valuable subscribers get the best subject lines every time. And the more they open your emails, the better it is for you. Of course, to do this, you'll need to segment your audience by engagement, so that's the first step.