Interesting project. I like the idea of instant organization-specific message boards and the heuristic you chose for creating them. I do, however, suspect that

Interesting project. I like the idea of instant organization-specific message boards and the heuristic you chose for creating them. I do, however, suspect that choosing the optimum way to handle subdomains will prove tricky. (Should cs.example.edu be considered the same as psy.example.edu or alumni.example.edu? If not, would it make sense to have a parent example.edu board that is shared between all of them them? The same goes for company departments with subdomains.) Two suggestions on user onboarding: 1) put a log in and a registration link in the hamburger menu; 2) consider clarifying what "email-based" means when you use that term, i.e., point out that you do not actually send your comments via email.