Mayayana wrote:

| it, copy its raw source and post it here for others to analyze. I
| suspect either externally linked images or scripting is at fault.

He's already posted links to an email that
works and one that doesn't, as .eml files.
They're very similar, but the newer one is
slightly different, with different doctype.
See a few posts back for the links. Both
emails have the images embedded; no remote
links. I found that both emails work fine for
me in both OE6 and TBird 24. So the issue
seems to *probably* be an overlooked WM
setting.

One link Recta gave was:

https://dl.dropboxusercontent.com/u/...ber%202014.eml

Do you see headers in there, like the Content-ID headers to match up
with all the cid (content identifier) references?

I see the HTML code that would be contained within the HTML MIME section
in the raw source of the e-mail (but not even the MIME headers in the
body that delineate the HTML MIME section). I don't see the MIME
section for the plain text part (if the sender included both text and
HTML versions of the message to ensure non-HTML clients could still read
the message). I don't see any of the headers, especially the Content-ID
and other content headers. I don't see the MIME parts containing the
encoded strings that define the images (if they were inline or attached
instead of hyperlinks pointing to external content).