Image attachments not working in gmail

Source: Image attachments are not displayed in emails | Jira | Atlassian Documentation

Adding Jira to Google’s allowlist

This applies only if you’re using Gmail. Gmail uses Google’s secure proxy server to serve the images you’re getting, just so you’re protected from any image-based security vulnerabilities. If your Jira URL is not allowlisted in Google, the images won’t be displayed.

How to fix this:

• See Set up an image URL proxy allowlist. This is more of a task for an administrator, so try contacting them if other solutions don’t work.