Thanks; this is great feedback. A couple responses:
- See security comments elsewhere. Inky does not send our servers your Inky password.
- Grouping emails by subject: email threading information is pretty broken in practice; many clients don't populate References: properly, and Outlook uses its own thing called Thread-Id. So we have to use heuristics in many cases.
- Email thread structure: you're the only person who's ever asked us for this. GMail's pretty much killed real threading as a design.