Sebastiaan de With points out how broken email is:
the list of comically broken anachronisms in email as a system — a system we rely on and use every day — just goes on and on. This isn’t just an ‘oh, that’s kind of bad’ type of thing: email has to be fixed.
His mock-up of a first step in making email systems smarter and more human-understandable is great. I wouldn’t be surprised to see more ideas like this come from Sebastiaan.