A lot of people in our company have been receiving a suspicious email lately. I haven't been able to find any information about this message at all, though. The message has no from address, the subject is 'NOTICE: mail delivery status', the body is empty and there is an attachment called NAI_Alert.htm. We have Norton 8.1, mostly Windows 98 machines, everyone uses Outlook 2000 and a Win NT 4 server. Any ideas on what this is or how to stop the messages from coming. The first reported time this message was received was about three weeks ago. Since then more and more people have been receiving it.