On macOS client when receiving email it does not auto-refresh or fetch and the client crashes when going into Account Settings > Plan & Billing.

I like the idea of decentralized email service, hope it matures to the level of ProtonMail if not exceeds it in the every near future. Would also be nice if a calendar feature is added along with delayed or timed emails plus recall sent emails (if possible) through an override function if the email has not been opened by the client.