Looking at the documentation this looks to be at a very early stage, but after reading it I think it's mostly on the right track to become a very interesting platform...
It's decentralised by design, has support for most things people expect (read notifications, group chats, polls, images, video, location, contact), almost every feature is usable by someone with a regular e-mail client and integrations should be very easy to develop (any e-mail library is good for developing a COI bot). Looking forward to a client and server to play around with... maybe I'll make my own as a toy!
