Would there be some way of wording a contractual agreement with a company such that all of their customers contracts would irrevocably end if such a backdoor we

Would there be some way of wording a contractual agreement with a company such that all of their customers contracts would irrevocably end if such a backdoor were installed. Tutanota should consider ceasing trading in response to this. Surely the court won’t force them to not just stop supplying email services to everyone.