Hi Goran, NDR is generated by your exchange when I send a message to xxx@xxxxxxxxxxxxxxx/org... The message reached your domain but active directory has no record for xxx user or group. Than exchange recognises it as domain=ok, user=unknown and it sends NDR to the sender (to me) in order to inform me about the delivery problem. As the message I sent didn't find a recipient, exchange deliver it into the badmail folder (it has to go somewhere). If you renamed your badmail folder, restart your server so exchange can recognise and hook up to the new badmail folder. Zoran