Make:

Rick writes - "This tutorial will explain how you can set up a Mac mini or other spare Mac to be a 24-hour spam filtering drone. The process utilizes Apple's Mail application, IMAP email, and C-Command's SpamSieve along with a few custom AppleScripts that will allow you to remotely train the Mac mini in the fine art of spam filtering. Soon you will be able to look in your Inbox, be it on another Mac, a PC, a PDA or even cell phone, and not have to worry about being confronted with a screen full of nasty unsolicited advertising and phishing schemes." - Link.

Related:

• Pictured here, the Mac mini robot. That's what a spam drone should look like - Link.
• Other Mac mini projects - Link.