Exch 2003, GW 6.0, Gateway 2.0 SP3 preventing Internet mail

Hello, all.

We have setup the FTF GroupWise Gateway 2.0 SP3 for MS Exchange to connect
an Exchange 2003 system with our GroupWise 6.0. Both systems already have
Internet mail connectivity, we really don't want/need to expose the foreign
addresses on either side for inbound Internet mail. I've tried breaking the
Links from the gateway to the GWIA in Link Configuration, but mail still
goes to the foreign addresses. We currently have:

GWIA-MainDomainMTA-ForeignGWDomainMTA-ExchGate-ExchSystem-ExchSMTP

Thanks!
-Joe Wells