If you did not send a message to onyxes.com you were probably the victim of e-mail spoofing. Email spoofing Mass-mailing worms often use a technique called "spoofing." When a mass-mailing worm performs its email routine, it randomly selects an email address from somewhere on the infected computer. It then uses that random email address in the From field, and emails an infected email to other email addresses it finds on the infected computer. There have been many cases reported where users of computers receive complaints that they sent an infected message to someone. Because the mass-mailing worm does not use the email address of the infected computer in the email it sends, there is no way to know where the infected email came from. (Symantec Anti-Virus Research Center website) We recommend that you check your computer for virus. Below is the information: The infected component in the scanned document was deleted. Violation Information: The attachment message.pif contained the virus W32.Netsky.P@mm and was deleted. The filename extension of attachment message.pif violated the content filtering rule Delete Attachment and was deleted.