Kevin Chadwick wrote:
On Wed, 30 May 2012 13:00:45 -0400 Kurt Mosiejczuk wrote:
That's also why spamd in greylisting stutters for the first 10 seconds. Many spammers disconnect now when stuttered at, so they give up before even starting the greylisting process.
It might be now. I believe the original reason was to tie up more spammers resources than your own.
That's why the blacklist mode stutters. It's a tarpit. Originally greylisting didn't stutter.
http://www.openbsd.org/papers/bsdcan05-spamd/ In particular, this slide: http://www.openbsd.org/papers/bsdcan05-spamd/mgp00017.html --Kurt
