I tested it by sending it to yahoo and to gmail.
The images do not load normally like html emails I have received from others. Instead, they are attachments.
I use the normal <img> tag.
<a href="http://www.website.org"><img src="http://www.website.org/email/images/header3.jpg" alt="website" name="editableImg1" width="600" height="325" BORDER="0" align="center" id=editableImg1 title="website"></a>
This is just one of the images.
All of them get sent as attachments. The rest of the email works fine.
Thanks for your time,