Sure it's valid but that doesn't mean it's not ambiguous. All it would take is an initial clarification (once near the top) that they're using "email" to mean "

Sure it's valid but that doesn't mean it's not ambiguous. All it would take is an initial clarification (once near the top) that they're using "email" to mean "email address" and not "email content" and then we can all give this the correct level of attention. I'm not for a moment suggesting this isn't bad but if you run about warning people of something important it helps to be clear and not risk exaggeration / ambiguity (or you play into downplayera hands and potentially waste the time of honest folk)