All ESI calls are issued client-side, so it won’t be banned as PodMail did. It uses all the latest frontend stuff, so it’s pretty etc etc.
I’m willing to add extra features if it is of any use to anyone!
Some ideas: responsive UI (for use in tablets/mobile), PWA (to allow to install it as an app), compose emails, fix showinfo URLs, fix font sizes, improve caching, …
Oh and: if you’re worried I might read your emails, don’t use it. I don’t read the emails, but the token does travel to the server for decryption.