Don,
The image was done by another person, and they told how they did it.
They "composed message with Rich Text Editor function. Drag/dropped
photo into message editor."
If I recall correctly, image drag-and-drop to the RTE only worked if the image was hosted somewhere, and the result was an "http" type of image. So that likely answers the mystery: it wasn't an attachment, properly speaking.
Shal
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