Linux Mail Header script/system
 

I would like more information about a Linux script/system that operates on mail headers to send all unidentified email back to the source with a random character generated verification system to verify email being sent is not spoofed, and not from a robot mailer (UCE/SPAM). This system would sort email address's by known contacts and unknown sources and allow for dumping all UCE/SPAM from robots that are spoofed to never enter the inbox.