Issue Summary

If the old email pipeline is in use, base64 images embedded in notification e-mails cannot be rendered:

Unable to render embedded object: File (image/png;base64,<...>) not found.

If “Email From” is other than "${fullname} (Jira)", it means tenant is not using the new Notification Platform as the Notification Platform system doesn’t know how to handle the custom "Email from" value. The value "${fullname} (Jira)" is the default one, It makes customer to use the new Notification Platform.

Steps to Reproduce

1. Change "Email from" value to a custom one in Jira System General config
2. Attach a base64 image to an issue that has notification active

Expected Results

In the notification e-mail the attached image is rendered correctly.

Actual Results

Attached base64 image is not rendered in the notification e-mail.

The below error is vidible in the notification e-mail file:

Unable to render embedded object: File (image/png;base64,<data>) not found.

Workaround

Change the "Email from" value back to its default so that Jira will use the new Notification Platform. Keep in mind that the email layout is different than the old one, and the Issue Event emails will be grouped in a 3-5 min window.