John, I’ve run a couple of quick tests and thought that J. Sternberg’s IFTTT Post Formats plugin might do the trick, however it didn’t seem to work as I thought it might. Perhaps it or something similar might be tweaked to provide this sort of functionality pretty quickly? At present it’s not mission critical, though it would be a nice way to create posts pretty simply.

see also: https://boffosocko.com/2019/02/04/testing-out-posting-to-wordpress-via-email/#comment-237103