While it’s hard to say exactly where and why the testing process went wrong, this carefully crafted message didn’t render properly. It’s especially unfortunate that the images that were causing the issue weren’t crucial to the design or message. The content was just as valuable (and easier to read!) when the images were removed and the responsive design was restored. The moral of the story? Test, test, TEST!
All the hard work and planning that [the mailer] invested into their responsive email design was almost overlooked since it didn’t render properly. Using a preview tool to see how your email renders in different email programs and mobile devices will ensure that investments made into mobile email strategy are flawlessly executed and visible to users.