[Pdns-users] Newbie Question

[Tom Rossi]

Thanks for the great explanation!

On 4/10/07, Derrik Pates <demon at devrandom.net> wrote:
>
> Tom Rossi wrote:
> > Thank you so much for helping me out.  I think I may be showing my
> > ignorance.  I thought it would have to be configured with a recursor to
> > be able to resolve something it is not authoritative.  So in my
> > scenario, the DNS is the authority for mydomain.com
> > <http://mydomain.com> and I have an MX record that points to
> > mx.google.com.  My authoritative DNS for mydomain.com needs to be
> > able to resolve mx.google.com.
>
> No, your authoritative nameserver doesn't have to care what
> 'mx.google.com' points to; it just returns the MX record by itself to
> the recursor. If the MX happened to be in a local zone, it could provide
> the A record that it points to, but that's not required. The recursor
> may (optionally) do additional processing, i.e., resolve where
> 'mx.google.com' points to, but this is not required either.
>
> > Do I need to configure a recursor
> > to make that happen?
>
> Your mailserver should either be running a local recursor (good for
> high-demand mailservers to prevent excessive waiting around for
> recursive lookups), or referring to one or more central recursors, which
> handle the task of recursive lookups for it.
>
> --
> Derrik Pates
> demon at devrandom.net
>
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