On 4/21/14, 8:41 PM, "/dev/rob0" <r...@gmx.co.uk> wrote:
>On Mon, Apr 21, 2014 at 04:26:50PM -0400, Wietse Venema wrote: >> I'm getting tired of questions about relayhost load balancing >> or source IP address diffusion. > >I understand the feeling. However, in many cases, the people who >want this are hurting themselves or hurting others: > >A. Self hurt: > 1. Greylisting woes: changing your source IP at random, you > never get through greylisting (like gmail and postscreen > after-220 tests before 2.11) > 2. Lower volume per IP address inhibits improvement in IP > reputation (in many cases, the REAL problem is poor/no IP > reputation) >B. Others hurt: > 1. Snowshoe spammers "flying under the radar" to avoid DNSBL > listings > 2. Avoidance of receivers' flow control, whether spam or not > >Yes, randmap & roundmap sound like interesting ideas, but are >they serving real use cases? Whether they are serving real wide-spread use cases or not, the functionality exists today. I was able to get mysql set up to ³randmap" the inbound traffic from my ³mail hygiene² servers to my internal servers without much difficulty and very little googling, once Wietse gave me a push in that direction. Had these primitives been there the solution would have been more obvious, but attempting to block a feature by making it hard doesn¹t deter either spammers or fools, so might as well make it easier for people with real corner cases.
