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I have a suggestion to augment the dns stuff. What do people think
of a rule like
reject if target host's ns is xxx ?
Like, assume xxx is a spammer's front. It looks like that there will
be new sites yyy using xxx as ns before it is discovered that yyy is
also a spammer's front. If the assumption that no decent site will
use a spammer's front as ns, this might prevent some unknown spammer
sites from spamming.
Does this make sense or will it work?
Ambrose C. Li <email@example.com> Programmer-analyst (sysadmin)
Toronto EDP, Ming Pao Daily News +1(416)321-0088 1355 Huntingwood Dr
Scarborough ON Canada M1S 3J1 [<- work ]
[ home ->] <firstname.lastname@example.org>