Sorry for pushing this topic up again, but I’m wondering if we can have two features for images in emails, as I’m also having users for which the images are not shown (by default). To improve the UX I’d like to suggest the following:
Feature request: Add image url to alt-Text. Rationale: If loading of external content is not allowed (probably default for many mail clients by now), (at least in thunderbird) only the alt-Text is shown. Thus the user sees only image0. If it would be, e.g. image0: https://example.com/uploads/default/original/1X/hash.jpeg the user could click on the link/copy the link and open the url with the picture in their web browser.
Feature request: Include fqdn in markdown (or replace markdown by image url) Rationale: The plain text part of the email will show , which needs know-how of the domain of the server running discourse/hosting the uploads and manual work to put the link together. Showing  or image0: https://example.com/uploads/default/original/1X/hash.jpeg) would enable the reader of the text/plain contents to directly click/copy the link to open it directly in a web browser.
Thanks for your work and considering the two feature requests!