[BtD] Google for 'email etiquette' and 'internet etiquette' and perhaps also cite some of that info to the people making you do this project. I killfile on HTML as well - companies have lost my custom for sending me HTML in emails after I asked them not to. Costing them five to ten grand in lost business, at a rough guess. (And companies who start out by sending me HTML-in-email never get my custom in the first place.) The fact that most people are ignorant of correct email etiquette - because no modern PC-based mailer I have seen has ever thought to mention the issue - doesn't mean we all are. And I for one do use it as a filtering critereon for who I will do business with.

[rab] Much obliged.

Raise your right foot from the ground and make clockwise circles with it.
While doing that, draw anticlockwise circles in the air with your right hand.

[raak] how does that work then? I feel an utter fool.

[nights] No idea, it came up on a mailing list on biological control systems. For another surprise, try it with the right foot and left hand.