If you are unsure what that file is then it is possibly just a signature file from another email client. Have you tried opening it in notepad to check?
Check out the link below for possible packages this file belongs too.
Yeah I tried opening it in notepad with no luck. I did find out its a print shop file (trying to open a brochure). WOuld anyone have this program and I could email them the file to open and save another way? I would pay.