How can I get WorkMail to display a data URL image in an email?

How can I get WorkMail to display a data URL image in an email?

If I receive an email with an external image link in it <img src="example.com/img.jpg"> it doesn't load by default, and there is a message saying

Click here to download pictures. To help protect your privacy, WebMail prevented automatic download of some pictures in this message.

Clicking on the button for that message has the image appearing in the email.

However, if the image link is a data url and the image is encoded into the actual email body, then it is still blocked, and clicking the "download pictures" link doesn't get the image ever appearing. Even adding the sender to "safe senders" doesn't help.

How can I get WorkMail to display one of these data URL images?

A data URL for an image looks a bit like <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgA........">

For example, a data URL for a PNG image of a small blue dot is below, and copying from data: to == and pasting it into your browser URL bar will show that image.

<img src="
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAIAAACRXR/mAAAACXBIWXMAAAsSAAALEgHS3X78AAAE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">

Cheers