We are using a hybrid exchange 2003 and 5.5 environment. Here is what we have. We have 2 domains. lets say prod.com with a child test.prod.com. there is a MS 2k3 pop server installed in the test.prod.com domain by the name of pop.test.prod.com. I have a contact created in AD with an email address of user@prod.com and its primary email address is user@test.prod.com. when sending from pro.com to the test.prod.com email address it first routes the message to our externally facing spam appliance and then back into the environment where it finds the user in the test.prod.com domain and sends the message on. i want to force any mail addressed to test.prod.com to stay internal with out trying to go outside of our internal mail environment. these messages are only from internal. test.prod.com will not be accepting any mail from outside of the company. all of our connectors are exchange 5.5 at the moment. where and what do i need to change on our connectors so anything sent from prod.com to test.prod.com will resolve internally and not try to go externally. Thanks for the help.