Current communication platforms are so massive (sms, whatsapp, e-mail, messenger etc.) that it feels like such a huge fight to get some form of network effect, that's why I was thinking of a way of integrating with them instead of creating a completely alternative channel. But it might be possible in some niches/ influencers way.

Anyway to better clarify my initial comment. There are chrome extensions, allowing you to schedule emails at certain times. You could do a similar things were you extend chrome with an extension for Pony Gmail, where you send email on the pony time scheduled. The sending part is solvable.

Receiving however, 2 problems: - Organise receiving; not sure if it can be done, but probably its somehow possible to create a service that saves all incoming meessages and then once a day serves it to a seperate inbox

- Senders probably sometimes need sn autoresponder, that's a problem already solved.

Anyway, just brainstorming out loud. Wish you all the best.