Richard Frovarp wrote: > > Make sure you are running a local caching name server. Even with a > real name server on the same subnet, I have heard of massive delays in > DNS lookups as a result. This in turn causes a massive slowdown in the > processing of mail. You are absolutely correct. However - we are running caches, and they really only help if you receive 'N>1' spam from the same source within 5-60 minutes (TTL of most RBLs). Unfortunately these BOT armies tend to mean we get the same SPAM *content* from 100-1000 *different* IPs per hour. In that case caching doesn't help (much).
Caching FuzzyOCR hashes helps :-) -- Cheers Jason Haar Information Security Manager, Trimble Navigation Ltd. Phone: +64 3 9635 377 Fax: +64 3 9635 417 PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1
