"David F. Skoll" <d...@roaringpenguin.com> wrote: > On Tue, 05 Jul 2011 23:26:16 +0200 > Andrzej Adam Filip <andrzej.fi...@gmail.com> wrote: > >> Would you recommend redesigning (mainly) DUL/DUL+ DNSBL lists to >> improve DNS cache hit ratio? > > No, not really. The poor cache hit ratio doesn't seem to be a problem > in practice (most people were surprised by the results). If you have > a high-enough lookup volume that it does become a problem, you just arrange > to obtain (or buy) the data and run a local authoritative name server.
You are most likely right in case of SA asking all configured DNSBL to generate spam score - improvement of some/minority DNS cache hit ration would not be impressive in improving overall preference. *BUT* It may improve performance e.g. in case of hundredths mail servers in a data/co-location center using shared forwarder and rejecting on first DNSBL hit. Somehow I doubt buying data for such "reseller" configuration is legally encouraged by paid DNSBL operators. -- [pl>en: Andrew] Andrzej Adam Filip : a...@onet.eu Welcome to Lake Wobegon, where all the men are strong, the women are pretty, and the children are above-average. -- Garrison Keillor
