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From John Levine <>
Subject Re: DNS cache efficiency for low-TTL records (was Re: IPv6 DNSBL/WL design, was Fwd: [Asrg] draft-levine-iprangepub-01)
Date Tue, 04 Jan 2011 21:07:01 GMT
>In summary, I believe DNS caching is basically *useless* for any site
>small enough to use Spamhaus for free.  And any very large site is
>probably large enough to deserve an rsync feed.

Hmmn.  See the ASRG list where I've posted some numbers I worked up
from my own servers.


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