On Tue, 22 Feb 2011 13:33:56 -0500, Daniel Kahn Gillmor <dkg@fifthhorseman.net> wrote:
> i think the correct solution would have nothing to do with text/html vs
> text/plain, but would have to do with whether the message is
> multipart/mixed or multipart/alternative.

Thanks for pointing that out — I see my poor knowledge of MIME is showing.

Of course, that sounds like the correct thing to do. However, I'm
looking for a (reasonably) quick fix, and what you're suggesting sounds
like a re-design of at least a part of the MUA. Isn't there an easier way?