Are you sure that the problem is not at the receiving end? Have you tried emailing the same items to yourself? If you see a red 'x' in a box where the photo should be, then the problem is a setting on the receiving email client - so I'm told.
Are you sending these pictures of the gmail web interface, or using a 'client' such as Outlook, Live Mail, Thunderbird, etc?
I just forwarded an email from my Gmail account to another account, and the images were missing, so I checked and it seems to be a known problem ....
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Forwarded images are not appearing
We are investigating an issue where users are having problems forwarding messages with inline images, as the images are not appearing for the recipients of the email.
Having this issue?