Which exchange version you are using? If you are using Exchange 5.5 IMS. You can use the registry editor to stop receiving <turf> e-mail from certain domains. Create the value "TurfTable" under the registry key Hkey_local_machine---System----CurrentControlSet---Services----MSExchangeIMC----Parameters. Data type is Reg_Multi_SZ. Open the multistring editor, add the unwanted domain names one by one, for example if you want to blcok domain xyz.com, type "@xyz.com". Write one domain name is one line. You can add a user e-mail address also. To restrict the user from sending to unwanted domains, I normally add these domain names into the IMC object COnnections -- Mail Delivery --E-mail domain section. In the smarthost, I give a bogus IP address. The e-mails will not deliver and time out ultimately. I donot figure out now how to do this in a sophisticated manner. Regards Sakhawat Hussain > How do I successfully stop mail being sent to and received from certain > addresses or domains? All information I have found so far points to entering > the addresses in Message Delivery -. Unfortunately it doesn't seem to work.