The Undeliverable messages wont stop

[suedaisy]

I have turned off the relay at the exchange 5.5 server. I have updated the latest security patches for Internet Explorer and Outlook. And my boss still constantly gets "Undeliverable" or "System Administrator" messages that she knows she never sent. Is it that Klez virus? Is someone still using us as a relay? I'm at my wits end. Help. My boss uses WindowsXP and OfficeXP, by the way.

 

[Dollar]

Although I am not in a domain scenario, I have received mail from friends who claim they never sent them. Turned out, after requesting them to Forward the entire message, that there was a *.dat file attachment containing the Kletz virus, so it could well be a virus (either that or some other virus) infecting the system.

HTH