Save-the-Environment VS Mailspring-Libre

Here's a install script I made, let me know if it works for you:

https://github.com/spiritphyz/Save-the-Environment/blob/main...

If you want to give it a try I recommend you to use libre version since the telemetry has been removed in that one: https://github.com/notpushkin/Mailspring-Libre

Seconding the Mailspring recommendation, but be aware that it requires a Mailspring ID. There’s some progress, though, with a telemetry-free fork[1] (that’s the version I’m using right now) and plans to make the ID optional in the official client [2].

[1]: https://github.com/notpushkin/Mailspring-Libre

[2]: https://community.getmailspring.com/t/mailspring-without-mai...

N. B. Please note that Mailspring Libre build isn't fully open source right now: the sync engine, MailSync, is proprietary, and while we're working on replacing it, it probably won't happen anytime soon. By downloading Mailspring Libre build, you accept the MailSync license (which doesn't affect you as a regular user).

I've just started using Mailspring-Libre. I've only used it for basic scenarios so far but I have no complaints. I can't speak for power-user features yet.