I have a story with FairEmail. As I'm always looking for 'libre' (or at least open source) alternatives to the apps I use, one day I came across FairEmail. I saw that it had an app in the Playstore and in F-droid... I did a little research in their repository and then I decided to try the F-droid version. I had to enable Google's option for "unsafe" apps to allow me to use my Gmail. About a week later I get the alert of an attempted login with my Google password. I decided, after changing my password, to uninstall Fairmail (it was the only place I put my password so it could have been leaked). But I was always left with the doubt that Google might have possibly spoofed that login attempt so that I would just go back to using the official Gmail app.