To:
dnsop@cafax.se
From:
Kevin Darcy <kcd@daimlerchrysler.com>
Date:
Mon, 24 Mar 2003 12:44:50 -0500
In-Reply-To:
<61589.1048455017@shell.nominum.com>
Sender:
owner-dnsop@cafax.se
User-Agent:
Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.3) Gecko/20030312
Subject:
Re: [RETRANSMIT] Re: Radical Surgery proposal: stop doingreversefor IPv6.
Jim Reid wrote:
>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.
>
Which is just another way of saying you're using it as a (very porous)
form of spammer-versus-not-spammer authentication.
- Kevin
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