Requirements for Images in Notifications
It's recommended to embed images in notifications using a URL. If you decide to insert an image in a notification, consider the following:
-
The image must not exceed 64 KB.
-
The image must be in RGB format.
-
The image must be one of these file formats: .png, .jpeg, .bmp, .gif.
Note: The maximum size of a notification is 15MB. If you exceed this limit, the notification
might not be sent. To respect this limit, you can optimize images or logos in the
notification.