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. It's an easy way to get the most opens for your email and learn a little more about what your audience responds to.

It's also a good way to have some hard data to back up your claim to the title of the office's Chief Subject Line Captain of Copywriting Majesty before you make it official with that back tattoo.

Anyway, with the launch, 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.

If you're ready to jump right in and split test your own email, log in and try it. You can also watch a 90-second screencast to see it in action.

Have you already run a split test? Let us know what you learned, and perhaps we'll feature your results on the showdown soon.

And happy split testing!