kmail + qtwebengine (double-line spacing)

[AJSlye]

I'm not sure. Doing a quick google search I've found various unresolved issues with double spacing in html emails with kmail dating all the way back to 2004. https://www.google.com/#q=kmail+double+spacing

I also found this that suggests that there are some issues with the way outlook formats it's line breaks in html e-mails that kmail, gmail and other client's can't interpret that causes this issue. http://www.slipstick.com/problems/messag...le-spaced/