Email subject lines

Emails often succeed or fail on subject lines alone. Learn how to write compelling, click-worthy subject lines that stand out in customer inboxes and keep your emails out of the spam folder.

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Email subject lines

50 summer subject lines + 3 tips for sunny copywriting

An inventive list of summer-themed subject lines that you can draw inspiration from.

Email subject lines

The results: What happened during the Subject Line Slam Dunk?

We A/B tested eight subject lines, knockout tournament style, to find out which one was best. A or B? C or D? Which clever catchphrase was voted our champion? We take a look at the results.

Email subject lines

The finals: Subject Line Slam Dunk championship

A or B? C or D? The NCAA has the Elite Eight, we’ve got our Slam Dunk Subject Lines. Which clever catchphrase will be our champion? We're down to the Final Two.

Email subject lines

The Favorite Four: Subject Line Slam Dunk semifinals

When subject lines face off, you win. It’s the semifinal round of our Subject Line Slam Dunk tournament — the ultimate A/B subject line test. Vote today!

Email subject lines

Put a spring in your emails with 25 fresh subject line suggestions

Spring forward with creative copywriting and give your readers something to click on. We've dug up some fresh springtime subject line inspiration to get you started.

Email subject lines

The ABCs of A/B testing | How to base your subject lines on science

You can create more impactful email subject lines and increase open rates by A/B testing copy. Here's how to get started.

Email subject lines

Announcing the Subject Line Slam Dunk contest

When subject lines face off, you win. We’re A/B testing eight subject lines, knockout tournament style, to find out which one is best. Vote today!

Email subject lines

From subject lines to email templates, it’s time to spring clean your email marketing efforts

Spring is officially here, heralded by the spring equinox yesterday. The sun is peeking out and it’s spring cleaning season — time to air out closets, clean house, and switch your wardrobe for warmer weather. It’s...