It would be nice to have a feature that switches all E-mail messaging parts to a bottom posting communication style [1]. Currently, Zammad seems to enforce top-posting style, only.
I am aware of most people defaulting to top-posting. Still, for easy-to-read communication flows with people who can handle it, bottom-posting really facilitates the communication flow.
It would in fact be nice, to make the posting style a user property, so one can set it for customers depending on their communication skills / habits.