Thanks for your insights, that's really interesting. Also, if you are putting the same amount of attention to detail and focus on pragmatism over beauty that Zoho Mail uses, I think you'll kill it. I'm by no means dogging on Zoho Mail, I think it's good looking. But the reason I love it is that it's loaded with features/settings, and it's done in a way that is intuitive and highly usable.

No connection to Zoho other than being a happy mail customer