@tael @hipsterelectron @zzt Thank you for such detailed explanations. Indeed, from what you’ve described, it seems they weren’t clear about the terms of their service. Personally, I knew from the start not to use my personal paid accounts for any activity requiring greater protection. In that case, I would use a free account created through their Tor site. But I suppose one shouldn’t assume that users are aware of these details.

@tael @zzt @hipsterelectron As I understand it, Proton doesn't claim to guarantee your privacy, let alone anonymity. What it does claim is that it provides an infrastructure that allows you to achieve better levels of privacy and even some degree of anonymity if you take the necessary precautions. One example is its onion site for email and its recommendation to use TOR in certain threat scenarios. And you'll always come across warnings like this (taken from https://proton.me/blog/protonmail-threat-model)