[neals]

This is the most German thing I've seen since Octoberfest 2016.

It seems weird to me to have to find out the preferred way of communication to this level of detail, I already loathe that one cient of mine that only uses Facebook messenger for all communication.

[Moru]

Thunderbird has settings for each of your contacts for this reason. You can set if they want HTML or text only mails.