Need help for Ultrix sendmail.cf - creating a mailhost

[David R. Strip]

(usual apologies if this is a frequently asked question -
I don't read these groups, and am seeking help :-) )

I would like our mailer to take any unresolved internet
addressed mail and forward it to another machine which
can resolve the addresses. Is there a change to the sendmail.cf
you can describe to me, or is this a major league change.
Thanks
Please e-mail as I do not read these groups.
Strip
drstrip at cs.sandia.gov