Hello: We have Groupwise setup with teh GWIA gateway on the public
interface on the BM38 server. We also have a stateful filter for port 25
setup for public to public to allow the GWIA to see the smtp traffic. We
are now using an external spam and virus filtering service and I wish to
restrict GWIA from excepting traffic except from three subnets which this
service holds.

Is this possible? How?