To:
Kevin Darcy <kcd@daimlerchrysler.com>
Cc:
dnsop@cafax.se
From:
Jim Reid <Jim.Reid@nominum.com>
Date:
Mon, 24 Mar 2003 10:49:51 -0800
In-Reply-To:
Message from Kevin Darcy <kcd@daimlerchrysler.com> of "Mon, 24 Mar 2003 12:44:50 EST." <3E7F4412.4060706@daimlerchrysler.com>
Sender:
owner-dnsop@cafax.se
Subject:
Re: [RETRANSMIT] Re: Radical Surgery proposal: stop doingreverse for IPv6.
>>>>> "Kevin" == Kevin Darcy <kcd@daimlerchrysler.com> writes:
>> Reverse DNS does uses, even for IPv6. They are not necessarily
>> related to authentication. When reverse lookups of the hosts
>> sending me email don't work, this is almost always an
>> indication of spam.
Kevin> Which is just another way of saying you're using it as a
Kevin> (very porous) form of spammer-versus-not-spammer
Kevin> authentication.
Indeed. But it's an effective first line of defence. It's not the
only one.
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