I understand that Gmail etc block embedded images. Does that sound right?
My mail client (Lycos.com) blocks images but allows the mail itself to go through (even if it ends up in the spam box, I can whitelist it). I can specifically ask to have the images shown. In any mail client that acts like that, I would have no problem embedding images. If they're blocked, oh well.
It's a problem when it causes the entire message to be blocked.
Hm, nice link ralph, just read it.