Mac Stuff: Using Mail to Run Scripts

Here's a good and simple post on getting your Mac to run commands based on e-mails it receives. Try doing that with Outlook Express.

I know that post is supposed to be simple, but wouldn't be even better if there was rule that just evaluated the message of your e-mail as if it was an Applescript file? I've never tried any Applescript-ing, but surely this must be possible.