The upstream ticket is unanswered for 4 days now, I suspect neither Discourse dev nor Discourse proponent care about email mediated communication, making this problem’s only possible fix being a “scratch your own itch” project.
We do care about email mediated communications, that’s why we put an extensive amount of work adding support for both incoming and outgoing emails in Discourse. That said, it’s a tremendously difficult task to account for every use cases as those often conflict with one another.
Trying to diagnose your issue and better understand your user case, here’s how I understand things are going
- Your instance is setup to receive incoming email from a mailing list
- The user “Martin_Spott” sent a text/plain email to your mailling list
- Discourse processed the email, transforming the plain text into markdown / html to be displayed in Discourse
- You received a copy of that email, because you’re watching that topic / category on Discourse
- The content of that email is mangled
Am I correct?