In developing a rich HTML sig for a client that has some very specific requirements with regards to content and layout, I've come up against an oddity or two.

The primary issue is that if the sender is on Outlook 2016 (and I believe 2013), the webkit-text-size-adjust attribute is stripped from any styles in the HTML. This isn't a problem for desktop browsers, but for recipients on iOS, it means huge fonts that break the layout.

An odd use-case I know - anyone found a way around this?