I am trying to use the Attachement Content Filter to prevent the distribution of a sensitive document outside of our orginization. I have a filter that matches on the filename that works fine. However when I try to filter based on attachment contents it seems to not be working. I have selected a text string somewhat unique to the document that I would like to match on. The attached document is a PDF file. Is the attachment content scanner looking for a regexp match in the MIME encoded attachment maybe?

Any help would be appreciated!