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 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.
--
John Hardin KA7OHZ http://www.impsec.org/~jhardin/
jhar...@impsec.org FALaholic #11174 pgpk -a jhar...@impsec.org
key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C AF76 D822 E6E6 B873 2E79
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