Comment 75 for bug 849416

I really don't believe we need a renderer, that puts the solution in the too-hard-wont-get-done-for-another-five-years bucket. Just a quick look at how these messages are handled by EVERY other mail client I've tried shows how to do this ... treat it as an attachment, i.e. from Outlook it should be treated as multipart/mixed, not multipart/alternative.