Hi Praveen, By default the SMTP virtual server Message Categorizer will not check the delivery restrictions list unless specifically configured to do in the exchange server registry. On Each exchange server that host an SMTP bridgehead, you must create a REG_DWARD registry value called CheckConnectorRestrictions in the below key. HKLM\System\CurrentControlSet\Services\Resvc\Parameters. Once you have set this key, restart the SMTP and Exchange routing engine for the change to take effect. Once this is done the unauthorized users will get an NDR, when they send an internet message through that connector. Thanks, Manjeet ________________________________ From: Praveen Ramaswamy [mailto:ramaswamy_praveen@xxxxxxxxx] Sent: Tuesday, March 22, 2005 11:23 AM To: [ExchangeList] Subject: [exchangelist] RE: How to Disallow a Particular User From Sending Mails to External Domain http://www.MSExchange.org/ Restarted SMTP service but no luck! Regards Praveen R "Deshwal, Chand" <CDD@xxxxxxxxxxxxx> wrote: http://www.MSExchange.org/ Restart SMTP service. MS does not mention it, but it is required. Chand ________________________________ From: Praveen Ramaswamy [mailto:ramaswamy_praveen@xxxxxxxxx] Sent: Tuesday, March 22, 2005 10:45 AM To: [ExchangeList] Subject: [exchangelist] RE: How to Disallow a Particular User From Sending Mails to External Domain http://www.MSExchange.org/ For some reason the below said solution is not working for me. I added my id to "reject from" but i can still send mails to outside world. Is there anything else is missing?? Regards Praveen R Manjeet Singh <Manjeet.Singh@xxxxxxxxxxx> wrote: http://www.MSExchange.org/ One way to do this is go to your SMTP connector which is sending mail to outside world (either using dns or host record). Open it properties > and then move to delivery restriction tab. Add the address (for which u want to put the restriction) in reject message from. Now the user would not be able to send mails to outside world. And internal mail flow will continue using other connector. Thanks, Manjeet use to listadmin@xxxxxxxxxxxxxx