Our current configuration consists of 5 Domino servers, 3 Domino servers in a cluster, an incoming Domino server and an outgoing Domino server. The mail coming in first hits a Linux box running qmail and spamassassin and then the incoming Domino server via smtp. The incoming Domino server checks the recipient against the NAB and sends valid mail to the cluster via the Notes protocol.
Because of the vast amount of non-valid recipient addresses, we want to upgrade from 5.0.12 to 6.5.1 so that we can reject connections for non-valid recipients. To do this we need to have the incoming mail hit the incoming Domino server first, then send it to the Linux box via smtp, which would in turn send it to the Domino cluster.
The problem comes when the incoming Domino server receives an email with a valid address. When it looks at the NAB, it is going to want to send it to the Domino cluster instead of the Linux box.
How do I overide the routing to have the incoming Domino server route to the Linux box via smtp?