Some newsletter images may not display correctly in Zimbra due to parameters in the URL that this email client does not interpret. It is necessary to edit the newsletter content to correct these URLs.
Reason for the Behavior
Zimbra may not correctly interpret certain parameters included in image URLs.
For example, an image may have a URL with the following format:
https://static-resize.takesecurity.com/filters:format(png)/images/newsletters/shared/1/biometric-scan-1653673144.jpg
In this case, the segment:
/filters:format(png)/
is not processed correctly by Zimbra, preventing the image from displaying.
How to Fix It?
To ensure correct display of images in Zimbra, you must edit the newsletter from the platform:
Go to Custom Content > Newsletter
Click on New Newsletter
Select From Template
Choose the desired content
If the newsletter is already created as custom:
Go to Custom Content > Newsletter
Access the content editing
Select the corresponding language flag
Then:
Edit the content from the source code, accessed via the editor button "<>"
Search for image URLs containing the parameter
filters:format(png)Remove that segment from the URL
Repeat in all necessary languages to be used.
The URL should look like the following:
https://static-resize.takesecurity.com/images/newsletters/shared/1/biometric-scan-1653673144.jpg
Considerations
This behavior depends on the Zimbra email client
It is not a platform error
Applies specifically to images with transformation parameters in the URL
💡 Best Practices
Validate newsletters in Zimbra before mass sending
Avoid using additional parameters in image URLs
Test display in different email clients