The Federal Office for Information Security has tested how secure email programs are. They are apparently okay.

Protecting emails that contain sensitive data is crucial. The loss of confidential information or customer details can lead to hefty fines, negative publicity, and a significant erosion of customer ...

I have been moving from Google and Microsoft to Proton products. Proton's email and other products include encryption by default, and password-protecting messages adds a layer of security. However, I ...