bondo 1 Light Poster

I need to watch our mail server for a particular file that is sent in every day. I need to have my program grab this file and do some stuff with it automatically. Does anyone have experience with something like this? Really what I need is just pointed in the right direction. Where to start? I don't really even know where to begin or what exactly I'm looking for. I know there are programs out there that will monitor a MAPI client and log stuff like how big the emails were and what time they came in and stuff like that, but I haven't read about anything yet that just watches for a file and pulls it out of the email.

Any help is appreciated! Thanks.