Embedded vs remote images in email newsletters


I’ve noticed recently that my Substack newsletters don’t display images that are actually embedded in the MIME from the body of the email, although images that are remotely referenced appear properly. I have to visit the web version to see the embedded images.

As an example, check out today’s post on Substack’s main blog, particularly the screenshot from Bloomberg: A proposed cure for media angst about Substack - Substack Blog

My version received at Newsblur, where the Bloomberg screenshot doesn’t appear: https://www.newsblur.com/newsletters/story/8034206:a5ca6c

I also tested and it’s not just Substack, - I directly emailed from my personal email to my Newsblur email. A remote image showed up but not an embedded one.

Is this intentional?