DSPAM mail gateway setup

[User Ernie]

Has anyone managed to get DSPAM running with the FreeBSD dual sendmail
processes as a scanning, realy gateway for other mail servers? 

The DSPAM relay.txt documentation only talks about Postfix as an example. 
I want to use as close to a standard FreeBSD setup as I can without changing
to another MTA if possible.

I do have DSPAM install as the Mlocal agent for local delivery as a test
setup with no problems, just not sure how to make it a gateway box.

- Ernie.