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Date:      Sun, 2 Dec 2001 17:31:17 -0600
From:      Anthony Kim <niceshorts@yahoo.com>
To:        Jim Freeze <jim@freeze.org>
Cc:        questions@freebsd.org
Subject:   Re: Having trouble with Envelope sender verification
Message-ID:  <20011202233117.GB26050@boethius.telocity.com>
In-Reply-To: <20011202181329.K1485-100000@www.stelesys.com>
References:  <20011202220306.GA25820@boethius.telocity.com> <20011202181329.K1485-100000@www.stelesys.com>

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On Sun, Dec 02, 2001, Jim Freeze wrote:

> On Sun, 2 Dec 2001, Anthony Kim wrote:
> >
> > $ host -t ptr freebsdportal.com.
> > There is an entry for this host, but it doesn't have a Pointer
> > record.
> >
> > Also, I noticed another problem with your DNS.
> >
> > $ host -t ptr mail.freebsdportal.com.
> > mail.freebsdportal.com is a nickname for freebsdportal.com
> > There is an entry for this host, but it doesn't have a Pointer
> > record.
> >
> > --
> Hmm... would it help if I did not have mail.xyz a CNAME?
> I set up my zone record quite some time ago, and I don't
> think making a mail a CNAME is a good idea.
> What if I changed
> -----------------------------------------------------------
> freebsdportal.com.             IN  A  24.9.218.175
> www.freebsdportal.com.         IN  CNAME freebsdportal.com.
> mail.freebsdportal.com.        IN  CNAME freebsdportal.com.
> -----------------------------------------------------------
> to
> -----------------------------------------------------------
> freebsdportal.com.             IN  A  24.9.218.175
> www.freebsdportal.com.         IN  CNAME freebsdportal.com.
> mail.freebsdportal.com.        IN  A  24.9.218.175
> -----------------------------------------------------------

That should work. Now, on to reverse lookups!

> > Looking at your reverse lookup zone, I find:
> > 218.9.24.in-addr.arpa.  1D IN NS        ns1.home.net.
> >
> > I don't know how responsive @home is going to be, sorry.
> 
> Can't I control this if I run my own name server?

Not unless @home gave you a classless in-addr.arpa delegation.
Otherwise, no one besides yourself will attempt to query your
nameservers for PTR info.

This error is so common, even at my place of work. People assume
if they register a blahblah.com domain, and set up name servers,
they automatically control the in-addr.arpa zone as well. In fact
these are two distinct namespaces and can be (and often is)
under separate administrative management.

Now, your ISP may or may not grant you delegation - they won't
for a /27 probably but might for a /24. If not, they should
add/update the PTR records on your behalf. If they do not, they
suck.

Have fun!
-- 
"Le motd juste."

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