Since the Wild Apricot HTML Editor removes META tags, the @media queries for mobile device responsive designs are useless, since the "<meta name="viewport" content="width=device-width">" is lost and therefore on the mobile device the eMail app ignores them...

Since Wild Apricot is "going Responsive" now, I strongly recommend that this is a part of the future too, there has to be responsiveness in eMail design to be complete.

I spent couple of hours and trial and error until I noticed that the viewport meta tag is just removed and not my @media queries were wrong.