Can it be done?

[Jure Simsic]

I have a rather unusual situation i'm trying to solve.

I plan to have a mail server that should send mail (=>resolve) to
standard internet and at the same time to another network, that uses
the same naming scheme, only with their private TLD names (aka .foo).
This network also has a system of root servers as the-world-we-live-in
does.

The problem is to know which to ask when a "bogus" domain name has to
be resolved.
I thought of having some kind of caching bind server running to have
this correctly resolvable. Is there a way to make bind use two
different sets of root servers in such a case?

The other thing that I'm not really sure if it's a problem or not is
reverse resolution. This other network uses regular IPs that aren't
used in standard internet (they used some of their assigned blocks for
this network). How Would reverse lookup work in such a case.

The lame solution that I have is to have two mail servers that each
resolve one "internet", and the first forwards all bogus domain names
to the bogus-resolving MTA. But it's somewhat lame and i hope one can
boldly go where somebody has probably been before..

I'm trying to do this on a solaris 9 box with bind 9 (or any other if
that's a problem).

Any light on this one is really appreciated..

Jure