On Wednesday, June 30, 2004, 7:59:06 PM, David Funk wrote: > You will particularly notice this with SpamCopURI. It does the > DNS lookups on every URL's host until it finds one that gets a > 'hit'. So if it finds a spam-host in the first URL, it's done. > In ham, it does the DNS checks on all the URLs (with the attending > possible network delays with each DNS operation ;).
It's probably worth mentioning that recent DNS implementations cache hits and non-hits (NXDOMAIN) so that many lookups for a given URI probably only need to be fully resolved once within a few days. The DNS performance of then-cached hits or non-hits should be pretty good, assuming the same query (i.e., the same message URI) occurs more than once. Jeff C. -- Jeff Chan mailto:[EMAIL PROTECTED] http://www.surbl.org/
