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Re: uncooperative DNSBLs, was several messages

Rich Kulawiec <rsk@gsp.org> Fri, 14 November 2008 16:32 UTC

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Date: Thu, 13 Nov 2008 20:43:26 -0500
From: Rich Kulawiec <rsk@gsp.org>
To: ietf@ietf.org
Subject: Re: uncooperative DNSBLs, was several messages
Message-ID: <20081114014326.GA20521@gsp.org>
References: <Pine.LNX.4.33.0811121942450.12067-100000@egate.xpasc.com> <20081113112302.38928.qmail@simone.iecc.com> <e0c581530811130740g1db5cbfehbcdad361660bf48b@mail.gmail.com> <491C5339.8090801@dcrocker.net> <491CB529.5010101@network-heretics.com>
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On Thu, Nov 13, 2008 at 06:15:53PM -0500, Keith Moore wrote:
> For instance, what would happen if mail servers provided feedback to
> both senders (on a per message basis in the form of NDNs) and recipients
> (say, via a web page that listed messages blocked due to DNSBLs)...in
> both cases describing which DNSBL blocked the message and what the
> blocking criteria were?

These things are all outside the scope of this document, because they
pertain to how DNSBLs should be used, not how they should be operated.

(They're also not good ideas.  In the former case, backscatter/outscatter
spam will result.  In the latter case, presenting users with a list of
hundreds of messages per day serves no useful purpose.)

---Rsk



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