Your example is ridiculous because mail is a physical object. A better example would be "could you tell the stranger in room 301 that my friend's email is ABC?

Your example is ridiculous because mail is a physical object. A better example would be "could you tell the stranger in room 301 that my friend's email is ABC?" Then, later, your friend sue the hotel for telling the stranger about their email. Yeah.... You should at least bear the majority of responsibility here, no?