https://community.hpe.com/t5/operating-system-microsoft/exchange-mails/m-p/3214671#M4041 Does anyone know whether it is possible to prevent users sending and receiving INTERNAL mails, without blocking access to other features in outlook. Wed, 10 Mar 2004 09:42:52 GMT Kevin Daines 2004-03-10T09:42:52Z https://community.hpe.com/t5/operating-system-microsoft/exchange-mails/m-p/3214671#M4041 Does anyone know whether it is possible to prevent users sending and receiving INTERNAL mails, without blocking access to other features in outlook. Wed, 10 Mar 2004 09:42:52 GMT https://community.hpe.com/t5/operating-system-microsoft/exchange-mails/m-p/3214671#M4041 Kevin Daines 2004-03-10T09:42:52Z https://community.hpe.com/t5/operating-system-microsoft/exchange-mails/m-p/3214672#M4042 You might try adding x.400/x.500 to the denied protocols list under delivery restrictions, but that would only prevent RECEIVING internal mail. Thu, 11 Mar 2004 16:15:26 GMT https://community.hpe.com/t5/operating-system-microsoft/exchange-mails/m-p/3214672#M4042 Thomas Bianco 2004-03-11T16:15:26Z