I know you can trace the origin of an email.  Can you trace where an email goes to?  Take those chain letters for example.  Would it be possible to put code within the message, so every time a new person read it, you would know?  Or would the code have to be an attachment that was actually executed?
I'm not looking to spam, more curiouosity than anything.
			
			I'm not looking to spam, more curiouosity than anything.
				
		
			