Why this matters
Image-heavy emails are harder for filters and users to evaluate. If the message depends on images, mailbox providers may see little useful text.
This does not mean every visual email is bad. It means the email should still communicate clearly when images are blocked.
How to fix it
Add meaningful body text, keep images compressed, include alt text, and avoid sending a single large image as the whole email.
Retest after changing the template so you can separate content improvements from sender reputation movement.