Raw markdown is very readable and it would be nice to have an option to send the plain text version of a mail as markdown instead (org already supports export to markdown).
This is a straightforward feature to add if you feel inclined! Take a look at org-msg-export-as-text and the places its used, and make a new exporter based on that.
Raw markdown is very readable and it would be nice to have an option to send the plain text version of a mail as markdown instead (org already supports export to markdown).