Stock Android email app now available on Google Play
The Android email app will appear as an update for most owners of a Nexus or Google Play Edition device. It seems that there are some compatibility issues, though - because, according to Google, the Play Editions of HTC One (M7) and Samsung Galaxy S4 can’t receive the updated app. Anyhow, if you can receive it, the changelog includes: enhanced security for Gmail accounts, printing, easier account setup flow, and unspecified bug fixes.
source: Google Play
Things that are NOT allowed: