[dns-operations] OT: NXDOMAIN / public resolvers and zen.spamhaus.org

Stephane Bortzmeyer bortzmeyer at nic.fr
Mon Mar 28 10:50:32 UTC 2011

On Mon, Mar 28, 2011 at 11:23:07AM +0200,
 Emanuele Balla (aka Skull) <skull at bofhland.org> wrote 
 a message of 14 lines which said:

> > <http://www.spamhaus.org/faq/answers.lasso?section=DNSBL%20Usage#261> that it's the fault of the public DNS resolver.
> Where do they say that, exactly?!?

In the text pointed by the URL I mentioned:

> If you are using a free "open DNS resolver" service such as Google
> Public DNS or Level3's public DNS servers to resolve your DNSBL
> requests, in most cases you will receive a "not listed" (NXDOMAIN)
> reply

Which is blatantly false for Google Public DNS.

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