"Chris Lewis" <clewis(_at_)nortel(_dot_)com> wrote:
Tony Finch wrote:
Yes, blacklists do this already, though they are binary not ternary.
That's not necessarily true. Many DNSBLs are already multi-valued
(zen.spamhaus.org presently has 6 independent "flags"), and they can be
constructed to be more sophisticated with as many as 2^24 values on a
single return, and/or being used in scoring.
AFAIK all the multi-value blacklists are combinations of multiple
underlying binary blacklists, and exist to reduce the number of
DNS lookups needed to do multiple blacklist lookups.
Tony.
--
f.a.n.finch <dot(_at_)dotat(_dot_)at> http://dotat.at/
BISCAY: NORTHEAST 4 OR 5. ROUGH BECOMING MODERATE OR SLIGHT. SHOWERS. GOOD.
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