So i have a google Nexus 4 with the very latest Android 5 L preview,
We used to be able to have responsive emails on android from the default "email" app. With the latest Android L i installed today opening the email app you now get a screenshot saying to use the new gamil app instead which obviously still has no CSS support.
So from android 5L onwards we no longer have support for responsive emails, Lets hope the device manufacturers add some support for there own email clients.
What a huge step backwards
see here for a screenshot