Hi,
your HTML-code specifies that the image should be added as inline (embedded) image, to be sent along with the message text in the same message.
Normally Outlook 2007 (like OL2003 and OL2010) displays inline images. On the web you can find some people saying that OL2007 fails to display inline images (only a red cross is displayed), but the reason why some are affected by this problem is unclear (security update, etc.?).
Can you please send test messages to external recipients using OL2007 and verify that the inline image is not shown to them? Please include
franzk@netal.com and
testdit@nethal.com (the 'h' in nethal is not a typo) in the list of test recipients.
-Franz