From: Bill Cole (postfixlists-070913billmail.scconsult.com)
Date: Sun Sep 16 2007 - 11:07:05 CDT

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At 5:26 PM +0200 9/16/07, Tony Earnshaw imposed structure on a
stream of electrons, yielding:
>Bill Cole skrev, on 16-09-2007 16:59:
>>At 1:57 PM +0000 9/16/07, Mark Krenz wrote:
>>>On Sun, Sep 16, 2007 at 10:59:44AM GMT, Jan P. Kessler
>>>[postfixjpkessler.info] said the following:
>>>> Byung-Hee HWANG schrieb:
>>>> > Hi there,
>>>> >
>>>> > Does Postfix support Yahoo's DomainKeys?
>>>> > IMHO, I think DomainKeys is the best way to prevent spam.
>>>>
>>>> No, DomainKeys is a technique to prevent sender-forging. It does not
>>>> help to prevent SPAM as spammers may issue DomainKeys, too.
>>>>
>>>
>>> I think you're being a bit harsh. There is a great deal of spam out
>>>there that uses sender-forging. So it would help prevent some spam.
>>>Its not a 100% solution, but nothing is.
>>
>>Right, but spammers have adopted DK and DKIM faster than the
>>general population.
>
>Nonsense.

It is the truth based on the examination of tens of millions of
messages over the past 2 months comprising the post-DNSBL mail stream
of multiple corporate domains and some heavily-spammed microdomains.
Very little of that mail is signed at all, but the fraction of
definite spam that is signed is significantly higher than that for
definite non-spam.

It is certainly possible that the mail you see follows a different
pattern. I will refrain from calling you a frothing lunatic or
navel-gazing imbecile for that difference.

--
Bill Cole
billscconsult.com

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