I am running exchange 2003 with a software called exchange pop3 all the changes I set on the exchange server were changing the smtp port to exchange pop3 port and changed the connectors setting to forward all mail to the exchange pop3 servers ip.tried to block users through the connectors delivery restrictions but its not working.ANY help will be great.Thanks

Hi, Did you change the registry to make Delivery Restrictions function? Please understand that the Delivery Restrictions was disabled by default. We need to modify the registry by taking the steps below: 1. Start Registry Editor (Regedt32.exe). 2. Locate and click the following registry key: HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/Resvc/Parameters/ 3. On the Edit menu, click Add Value, and then add the following registry value: Value Name: CheckConnectorRestrictions Data Type: REG_DWORD Radix: Hexadecimal Value: 1 4. Quit Registry Editor. 5. Restart the Microsoft Exchange Routing Engine service and the Simple Mail Transfer Protocol (SMTP) services for this change to take effect. You can also view the below link as the reference. http://support.microsoft.com/default.aspx?scid=kb;en-us;277872 Thanks Allen