A recent article on the Litmus blog https://litmus.com/blog/what-email-marketers-need-to-know-about-ios-11-and-the-new-iphones pointed to Apple's Super Retina display on the iPhone X and image requirements for that device. Apple is recommending that we prepare images at 3X the intended target size.

For Retina devices, we're already creating images at 2X the size.

I think the impact on images at 3X would cause some images to choke on lower bandwidths and slower connections.

We haven't figured out a strategy yet, but keeping a library with 3 versions of images seems implausible.

Any advice would be greatly appreciated!