There are certainly strengths and limitations of default email clients on various mobile devices we use all the time, but what about the constantly growing list of 3rd party email clients available in the App Store or the Google Play marketplace? In the first in a series of blogs on the topic, I’ve run some tests on a selection of the more popular ones available in Apple’s App Store. Two templates were tested, each using non-standard Google fonts as well as a CSS3 trick (rotation) to see whether those technologies were supported. One template was responsive, with break points for certain screen sizes and the other was fluid, where everything in the email adjusts according to the width of the…