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Email Attachements download from MS Exchange Server
Did you use PPM to install MIME::Parser? It is the way I would suggest installing modules if you are using ActiveState. Just type PPM on the command line to enter the PPM shell. Once in the PPM shell you can search for available packages, using the command search xxxxx where xxxxx is the module or part of the module name you are looking for. In your case "search MIME" will give you a list of MIME-related modules. Once you find the module you need, use the install command to install it. Use the help command in the PPM shell for more details.
Incidentally, it is the MIME::Tools module that you want. It includes MIME::Parser and other modules you'll need like the "stringy" module.