On 03/22/2013 07:13 PM, Michael Heydekamp wrote:
I wasn't sure what the term "related images" exactly means. Attached images is clear to me, but what's the difference to related images?
Images used inside HTML code referred by attachment Content-Id. It might be <img src="cid:1234">. Such images are a message parts inside multipart/related structure of the message. Sometimes such attachments do not have a reference in HTML body, I call them unreferred.
So, we do not talk about attachment parts of multipart/mixed message, they aren't related with any part.