Before it hit shelves, F. Scott Fitzgerald’s The Great Gatsby was almost titled The High-Bouncing Lover . Doesn’t have the same ring to it, huh? Writing your email subject line is a lot like choosing a book title: You have to get it right, or people may never open it — no matter how fantastic the content is inside. In fact, 47% of email recipients admit to opening email based on the subject line alone. One of the most common questions we hear is: “what do I write in the subject line of an email?” Many people wonder how to write perfect email subject lines . While there’s no single formula to create the best subject lines for email marketing, the following battle-tested guidelines will get you pretty close to perfect. They can help you make your messages even more appealing to your subscribers. Apply them to your email subject lines, and you could be the next Fitzgerald of the inbox. (Looking for an email service provider that lands you in the inbox — and not the spam ...