If you enable email digest, when you get the digest it looks like this:
If someone has posted an image to a topic
Can you make it so it does not email that gibberish ?
Do you have nodebb-plugin-markdown enabled on the forum?
Yes, I think it was enabled by default when I installed NodeBB:
A Markdown parser for NodeBB
Installed 8.9.2 | Latest 8.9.2