A good subject line can make the difference between a successful email marketing campaign and one that falls flat.

As we mention in our FREE Ultimate Subject Line Guide download, figuring out the perfect subject line can feel like a daily guessing game. And preheaders — forget about it! Luckily, you don’t have to waste time guessing anymore. We’ve discovered key insight into the best and worst subject lines by analyzing billions of email messages sent by our customers over the past 15 years.

Here are the key takeaways from our subject line analysis along with proven strategies for you to implement right away to boost open rates.

Email Subject Lines Proven Strategies That Work Created By: iContact