John Hardin a écrit : > On Wed, 11 Feb 2009, Ned Slider wrote: > >> John Hardin wrote: >> >>> > You won't solve the backscatter problem with SPF. >>> >>> Nobody has claimed that. It helps, but it's not a silver bullet. >>
I have seen no evidence of that (that = "it helps"). and yes, I asked: this debate came in here a long time ago. feedback I've got here, in other lists and in private mail showed no benefits of spf users with regard to backscatter. I know that SPF is a cause of long debates. so I won't say more about it. >> I don't see how you can possibly quantify that. You have no idea how >> much spam was sent forging your domain so how can you possibly know >> what effect, if any, SPF is having. If you receive 3000 backscatters >> tomorrow, is that good, bad or indifferent? How much was blocked by >> SPF? Would you have received 6000 if you didn't have SPF in place on >> your domain? You can't possibly answer these questions. It certainly >> won't hurt, but I can't really see it's going to help much either for >> the reasons I stated earlier. > > I'll buy that. The most I would be able to say is "my backscatter volume > seems to have gone down" - purely empirical. > My BS volume varies, without any SPF related changes.
