See this thread, i.e. the post by Rishi Garrod:
This seems to be a problem with the sandboxing in Mt. Lion, a new security feature, built into the system. I do not know of any work-around so far, sorry.
Does anyone know if Automator can be used as an alternative to gettign photos to outlook?
I tried using Mac Mail and heres my problem...
The photos appear as 'inline' images in the main body of the email, not as standard attachments. I send photos of my twins to my folks and they are not that savvy to try and download the image first and then open it up. And to be honest thats a pain in the butt!
I found a webpage that directed me to add a line via terminal that stopped Mail doing that, and placed tradtional attachment icons in the mail but the recipent jist gets thumb nails of the photo that I then have to explain how to right clik on it, download it, open it and so on....
This is so ridiculous of Apple.