Remember .Mail? Designer Tobias van Schneider:
Sometimes you have to let go, to make room for new things & new thoughts. I like to take the start of the new year as an opportunity to let go and clean up my desk. Sadly, there are no plans to continue working on the development of .Mail app – I say this with a heavy heart, as I know that so many of you looked forward to this app the same way I did & I’m very thankful for all your support.
Bummer. I was really looking forward to this re-envisioning of the desktop mail experience.