Attached Link: Digimarc is the global leader in digital watermarking technology

(1) As a go forward protective measure, consider the use of Digimarc to apply a digital watermark to your images. (2) Use your friend Google to search both the Internet and Groups (Usenet) for your image -- search words would be words from the title of your image, graphic elements in it, etc. You might find the website for the eMail newsletter. (3) Speak to your lawyer. This is how I read it ... At the party, you met someone who has knowledge of a theft. If she were summoned to a hearing or trial and would not testify, she could be charged with conspiracy by concealing the crime. Your lawyer will know how to suggest that the woman at the party give up the information she has now and avoid additional entanglements. For that matter, could she be the one who sends the newsletter? Identity hiding is not limited to the internet. MGD