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Why subject line split testing matters

Since Emma’s subject line split-testing feature launched last month, we’re gleaned a lot from our own internal tests and those our customers have shared. Below are four case studies that find laying out your cards isn’t always the best policy, a thoughtful subject line is worth the time spent on it and limiting your appeal can yield a yawn of a response.

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Subject line split testing is here!

And we're challenging you to a subject line showdown.

Now in Emma, you can test up to three subject lines, and then let us automatically send the winning version to your whole list. With the launch of our latest feature, we're challenging you to a Split Test Showdown to see if you can spot the winning subject line from a few tests we and our customers have tried. Play the game at

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