From: Bill Cole (postfixlists-070913billmail.scconsult.com)
Date: Fri Oct 19 2007 - 23:02:20 CDT

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At 2:37 PM -0500 10/19/07, Noel Jones wrote:
>At 02:26 PM 10/19/2007, Joey wrote:
>>This all came up because I have been seeing these entries in maillog for the
>>first time ever...
>>Oct 19 14:25:11 houston postfix/smtpd[3754]: warning:
>>194.162.21.151.zen.spamhaus.org: RBL lookup error: Host or domain name not
>>found. Name service error for name=194.162.21.151.zen.spamhaus.org type=A:
>>Host not found, try again
>
>Ah, this is a different question entirely.
>Nope, haven't seen any of those here lately.
>
>Getting errors from other RBLs? Then check your name servers.
>
>Just from zen? There have been some reports of spamhaus blocking
>queries from sites they believe to not qualify for their free
>service. I can't confirm this.
>http://www.spamhaus.org/organization/dnsblusage.html

I can confirm that Spamhaus has been dropping queries from sites that
exceed the volumes on that page, and that sites which have exceeded
those numbers slightly for a long time have only recently found the
Spamhaus nameservers unresponsive. It is worth noting that while
Spamhaus has been asking large sites to pay for data feeds for
years, that page with the clear objective criteria is a fairly new
addition to their site.

 From my perspective, the clear criteria and the apparently increased
policing of heavy commercial users of the free DNS interface is a
positive development. It's getting entities that can afford it to do
what they should have been doing for years to support an important
service provider.

--
Bill Cole
billscconsult.com

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