It appears that Brian E Carpenter <brian.e.carpenter@xxxxxxxxx> said: >Of course. I tried to avoid talk of standards in my OP. But to your point, the mess doesn't arise from an MUA being unable to >present HTML mail; it arises when a mail thread alternates between authors generating plain text and HTML, such that the message >becomes very hard to read and often it's very hard to see who wrote what. Good point. Since it's basically impossible to tell modern MUAs not to sent HTML, we should refuse unformatted mail. If that's not what you mean, could you offer some practical examples? R's, John