this bit about messages sent me scurrying to the dictionary, Mess --came to from the latin mittere (it is a past part., of messes to send forth, came to mean a course (say at a meal one course of a seven course dinner) and then to mean food, and the place it was eaten, (mess hall), and then porrige or other simple food, to unappatizing food, and disordering eating of the food, to a disorderly collection of things!

meanwhile message-- moved from errand to communication!