Secure Exchange SMTP communication
May 19, 2009Configure SpamHaus or other RBL provider with Exchange 2007
June 10, 2009Open up the Exchange Management Console in 2007. Navigate to the system drive %Program FilesMicrosoftExchange ServerScripts then run the following commands
./install-AntispamAgents.ps1
Restart-Service MSExchangeTransport
Once this is done if you are using the server as a hub transport and it is the only Exchange server you have make sure to add it to the internal servers list. This list can be found in the Exchange Management Console under Organization Configuration>Hub Transport Global settings tab>Transport Settings>Message Delivery tab.
More information can be found here: http://technet.microsoft.com/en-us/library/bb201691.aspx