MX record for a subdomain

Hi all,
I have problem regarding public subdomain delegation
i have created an A record for subzone in BIND on a machine running Solaris10 Sparc to point to another machine running win2k3 as follows
sub.domain.tld and www.sub.domain.tld now i want to add an MX record for mail routing for the win2k3 machine do i need to set up DNS server for the win2k3 if so how can i configure the records for the subzone on win2k3 machine
Thanks in advance for your help

I think this is what you want.

Add a MX record for the sub domain.

sub.domain.tld. IN MX 10 sub.domain.tld.

You may want to name the win2k server something different.

ie:

sub.domain.tld. IN MX 10 win2k.domain.tld.