Hi All, We have been receiving a lot of NDR's from accounts that users have never sent E-Mails to, that the attachment contained virus.. moreover have been recieiving the Noarg virus as well... which is now being quarantined.. We are not open to SMTP relay, I have checked it myself... but can someone throw more light on this. Also receiving E-Mails from outside accounts that are sending mails to non existent recipients on our domain. LOTS OF THEM. IS this the Novarg Virus...???