Send a base64 image in HTML email
Using a rich-text editor, our users can drag and drop a saved image from their desktop to the editor. The image appears and displays properly in the web page after they submit.
Since the image is not uploaded anywhere, the editor saves the image as a base64-encoded image.
<img alt="" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA4QAAAFKCAIAAADKUQaBAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAP+lSURBVHhepP1p32zb
etc.
But it doesn't show up - not on the iPhone, nor two different versions of Outlook. The image is simply broken. We want to stick with base64 due to it already working with the web page and the ability to view an image if the user is offline.
Solution
Support, unfortunately, is brutal at best. Here's a post on the topic:
https://www.campaignmonitor.com/blog/email-marketing/2013/02/embedded-images-in-html-email/
And the post content:
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