Received: from 66.163.169.226 (HELO smtp106.mail.sc5.yahoo.com) (66.163.169.226) by mta440.mail.yahoo.com with SMTP; Tue, 02 Mar 2004 10:40:26 -0800
Received: from unknown (HELO sf) ([email protected] with login) by smtp106.mail.sc5.yahoo.com with SMTP; 2 Mar 2004 18:40:22 -0000

Looks like someone used one of Yahoo's Email servers to send this. The yahoo ip shows it came from Yahoo directly, and in the received from line it says HELO, that is a command you issue to a server on its email port to get it to acknowledge you(not through a website, this is done using telnet). The IP 80.96.95.2 is where the email was sent from, this could also be spoofed but most likely that is it. I tried looking it up and i didnt get anything. You can't really do much with this but oh well.