On 7 Sep 2004 at 20:15, David F. Skoll wrote: > Well, there is an absolute lower limit on the useful lifetime of a > domain. A spammer probably can't throw a domain away in much less > than 4-8 hours, because it takes that long to complete the spam run > and for victims to go check their mail. Although I check my mail > practically continuously when I'm at work, many people only check > their mail a few times a day. If SURBL can react within 15-30 > minutes, it will still remain quite effective.
This is a good thought, but caching of DNS records defeats this. I know that most BLs have low TTL in the records, but lower than about an hour would cause a lot of extra network traffic, especially on the "not found" responses. -- Jeff Rife | SPAM bait: | http://www.nabs.net/Cartoons/RhymesWithOrange/BigDogs.gif [EMAIL PROTECTED] | [EMAIL PROTECTED] | _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [EMAIL PROTECTED] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
