On Sun, Jul 18, 2004 at 06:19:01PM -0400, Nico Kadel-Garcia wrote:
Well said. Despite my carping, it's actually *possible* to make these things
definitive for a domain, but it requires the use of matching *singular* PTR
and A records for the hostnames. This is possible for domains that have
excellent control of their DNS, but not for a large percentage of domains.
In particular, it breaks down badly for SMTP servers that host multiple
domains, such as many of the ones that folks on this list administrate.
Well, I don't see the problem. I have such an smtp server that hosts
multiple domains, for example it hosts antianti.nl. Now, the ip for
antianti.nl is 80.126.206.91 (dig antianti.nl). Ok, the PTR for that ip
is sonolo.xs4all.nl (dig -x 80.126.206.91). And the A record for that is
80.126.206.91 again (dig sonolo.xs4all.nl). So i'm fine here. Note that
I have little control over the PTR. Even if I had no control, if the A
of sonolo.xs4all.nl would not be 80.126.206.91, my ISP has a serious
error in their setup, and I can apply contractual agreement on them to
fix it or something.
Koen
P.s.: not that it matters, i'm not using PTR anyway.
--
K.F.J. Martens, Sonologic, http://www.sonologic.nl/
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