German Law Compliant Email Archiving for Businesses
I would be so happy if Proton could do something like this where every incoming email gets saved for 10 years with NO way of deleting it. (I am pretty sure the law requires deletion to be impossible although even IONOS allows you to cancel your Email Archiving though I don't know if they still keep the old ones)
Collaborate with local ID Services like Germanys BundID/AusweisApp and the equivalent for other countries which map you to a real identity but the provider is the state so there are no privacy concerns.
Why not just login with your proton account? because that can be deleted and you will loose your access. Thats why it needs to be bound to a real identity, preferably your Tax-ID or something since as long as Germany for example knows of your existence, this Tax-ID cannot change.
Allow us to set multiple backup payment methods and if they all stop working stop archiving emails but keep the existing ones for 10 years as of receive date.