Re: Sufficient email authentication requirements for IPv6

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On 04/10/2013 07:14 PM, John R Levine wrote:
Like I said, things have changed since 1996.

Indeed they have.   Email is much less reliable now than it was then.

Agreed. But it's not the DNSBLs, it's all the other stuff, notably heuristic content filters, that we have to do to deal with the 95% of mail that is spam these days.

In a sense, it's the same problem. Bad heuristics are being used to filter content, generally without the affected users getting any notification or having any recourse. Whether a DNS-based oracle is involved, or whether the heuristics are being applied to source IP or DNS name, are largely irrelevant. Certainly using DNS doesn't make the use of bad heuristics any better.

Keith





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