It appears that Keith Moore <moore@xxxxxxxxxxxxxxxxxxxx> said: >After MIME got out the door, it took a long time for the user agents to >catch up with even the modest increase in capabilities, ... > (MIME had richtext, but I don't think it was obviously better for >email than HTML of that time was. And some web browsers had email user >agents built in, and those browsers already had HTML support, so HTML >"won".) HTML did more than win, it became the place where people put all of the interesting structured stuff. See schema.org for a bunch of examples, or look at the structured email stuff happening in the IETF: https://datatracker.ietf.org/doc/bofreq-happel-structured-email/ R's, John