Bear in mind that this list, by it's very subject matter, self-selects for members who tend towards old school tools and technologies. Mutt users are obviously more likely to be strict about text-only, 72-column wrapped messages than users of, say, GMail.
The main point about any etiquette is that different rules are appropriate in different situations. When conversing with mutt users, follow the classic text/plain formatting conventions. -pd ---- The Tech Curmudgeon www.techcurmudgeon.com