Your New Email Super Power: Device Testing With Litmus

We’ve been working on a killer new upgrade to Sendwithus that should really improve your experience creating, updating, and testing your emails and understand your customers’ experience. The upgrade comes in two forms: a cool new editor feature, and a powerful new dimension to reviewing sent emails.

Last year, we rolled out the side-by-side code editor/preview along with the click-to-scroll functionality that finds the line of code responsible for any element you click on in the preview. This year, we want to raise the bar even more so we’re introducing Device Testing, powered by Litmus.

Device Testing will allow you to preview what your fully rendered email will look like in any major client, quickly scan for errors, and generally take the anxiety out of pushing changes to your emails. Have a look:

See your emails rendered beautifully in over 40 different email clients.

See your emails rendered beautifully in over 40 different email clients.

That’s Cool, How Does It Work?

Elbow Grease, Pixie Dust, and the Litmus Instant API.

Right, But How Do I Use It?


  • Edit your template as normal
  • Click on the Device Tests tab
  • Select which devices you want to test
  • Run the test
  • Click on a preview to zoom in and cycle between them with your arrow keys.

If you’d rather hear these steps in the calming, dulcet tones of our own Dylan Moore, check out our video introduction:

For more details on the ins and outs of the new feature, you can also check out our How to Use Device Testing guide.

But Wait, There’s More!

More accurate rendering isn’t just about the preview, it’s also important to the review and support processes. For this reason, you will also find the device preview popping up in your sent email logs, too. If you view the details of a template send, you will see something new: you can now view a sent email in a virtual version of the client it was opened on, complete with the original dynamic data.


We’re really excited to see all the ways you come up with using these features and, as always, we’d love to hear your feedback on what we can do to make every part of Sendwithus work better for you. Feel free to use the in-app chat or hit us up at and tell us what we should do next!

Share this post
Tweet about this on TwitterShare on Facebook

Leave a Reply

Your email address will not be published. Required fields are marked *