Currently, we do not have the ability to create threads on Discourse by email.
I would have to visit that horrible web interface, currently, to create a
thread. One of the many reasons I have not created any threads since the day I
made this account. Additionally, the emails sent by Discourse have terrible
formatting, to the point that I sometimes have to convert these weird emote
things and [quote] nonsense to plaintext.
Email is definitely for the “21st century”, many of the specifications
defining current email were created around 2005-2008. Additionally, there’s
that weird web interface thing the Fedora folks made if you really want a web
interface for email. It looks “modern” and web-like.