I’ve followed the ‘stacking tables’ email design from this article Campaign Monitor Responsive Email Design which works fine apart from image resizing in Outlook.

Here’s where i’m up to so far: Test responsive email

Outlook always displays images at full natural size. I’m trying to resize them by setting <img width=“100%”> to fill a table cell, but that is not being obeyed.

img { width: 100%; } isn't obeyed in Outlook either.

What’s the best method to resize an image (if at all) in Outlook?