I didn't mean for my comment to come across as disagreeing with your overall point - just highlight that there is (in my mind) a fairly big difference between a

I didn't mean for my comment to come across as disagreeing with your overall point - just highlight that there is (in my mind) a fairly big difference between auto-generated footers attached to outgoing emails that you referenced (re banks, teclos) and explicitly written instructions at the beginning of an email.