Some searching finds this comment. [1] I would be interested if such a password reset were possible against someone who for instance had 2FA enabled, no recovery information and only accessed their account using the Tor onion-service. ;-)
The number of tutorials I have seen about spinning up a tor relay on a VPS is crazy. These tutorials are probably written by three letter agencies - though I have no proof.
Regardless, protonmail doesn’t let people register when connecting with Tor unless you use phone number or card to make a payment. You will have to give up something which identifies you, and so it really doesn’t matter when you connect with Tor after you have already registered - there is a way to connect who you are.
> Regardless, protonmail doesn’t let people register when connecting with Tor unless you use phone number or card to make a payment
Actually if you attempt enough times you will get the option to verify the registration with an e-mail. And they are rather liberal with which options they accept. So it is not exactly a circular dependency.
From there is it an exercise to the reader to create an account not linked to any other identity.