It’s not only about E-Mails, also about browsers and search engines. I’m mostly using DuckDuckGo, seems to me safer than google. I’m also using NordVPN, because I hate being spied about my internet activities.This is a good place to start. If there becomes enough interest, we can add a tech category. Till then, here we are.
I am deeply tied into the Google infrastructure on nearly all levels. So I am a bad person to answer this at the present time. I also would like to cut the ties and use an alternative to Google and Apple.