I have a customer who has a "Hotmail" email address and has received an email with an attachment that is called "smime.p7m". When we click on the attachment, you get a choice of "open" or "save". When we click "open" we get a popup asking about allowing a website to open the email and we say yes, but nothing happens. I can save the file to the local computer, but I can't find a viewer that will let me open it. I did find P7MViewer from Cryptigo, but it doesn't seem to work with Vista. It works on XP, but has no stand alone unistaller and can't be removed through add/remove.
How can I view this file in Vista?