where to declare

[Michael Voight]

It is an obligation.
If you tell my.domain to delegate the zone bogus.my.domain, then ALL
records for bogus.my.domain MUST be in that zone. What would be the
purpose of delegating a subzone if you weren't going to look there for
the information??

In summary: Yes, this is an obligation. It is how DNS works. If you have
a subzone, then that is where you go to look for records for the
subzone.

Michael

"Gerard M. Mamou" wrote:
> 
> Hello
> and thank you for the answer.
> Your advice is it a recommandation or an obligation?
> And why it is working when I declare it in the my.domain file?
> Do you mean that a external sendmail is checking the MX record only in
> the
> bogus.my.domain?
> TIA
> Gerard Mamou
> 
> marka at isc.org a écrit :
> >
> > > Hello
> > > I have a zone my.domain and a subzone bogus.my.domain
> > > I have a Name Server ns.my.domain and ns.bogus.my.doamin (which is the
> > > same A, same machine)
> > > Where should I declare the MX records for bogus.my.domain
> > > in the file of my.domain or in the file of bogus.my.domain????
> >
> >         In the zone file for "bogus.my.domain".
> >
> >         Mark
> > >
> > > my.domain SOA ...
> > >
> > > bogus.my.domain       IN      NS      ns.bogus.my.domain
> > > bogus.my.domain IN    MX      mail.bogus.my.domain
> > > ..
> > > end of db for my.domain
> > >
> > > or
> > >
> > > my.domain SOA ...
> > > bogus.my.domain       IN      NS      ns.bogus.my.domain
> > > ..
> > > end of db for my.domain
> > >
> > > bogus.my.domain SOA ...
> > >               IN MX mail.bogus.my.domain
> > > end of db for bogus.my.domain
> > >
> > > Is there any differences??
> > > How it is resolved??
> > > Which one come first???
> > > Which one is better???
> > > I have also a slave for my.domain ONLY in my ISP name server
> > > Maybe the First method is better in case ns.bogus.my.domain come down
> > > the record will be resolved anyway because it is in my.domain file???
> > > Any helps?
> > > TIA
> > > Gerard Mamou
> > >
> > >
> > --
> > Mark Andrews, Internet Software Consortium
> > 1 Seymour St., Dundas Valley, NSW 2117, Australia
> > PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org