Zone Delegation

[J, C]

Hello,
I would like to be able to setup BIND so that if it is asked for any
records in a particular domain, it does not perform the lookup but asks
another server that will have the records.  Currently, I have forwarding
set to that "other" server for all requests, and it works fine for that
"particular" domain I talked about above, BUT, all DNS requests are
going to that "other" server as well.  Since these "other" servers are
slow for general lookups, but required for that "particular" domain, I
would like to setup BIND to work in the following manner:
 
Accept all requests
If the lookup is for a domain it is master for, lookup and return to
client
If the lookup is for abc.com, ask this other server over our Intranet
and return to client
If the lookup is for any other domain, forward request to our LOCAL ISP
(not over the Intranet)
 
I hope that this will help speed up our DNS resolution.
 
Thanks,
Chris