John Levine wrote:
[ resent with reasonable MIME headers ]
This note seems relevant to DKIM. This draft says, predictably, that
the way you add new data types to the DNS is with a new RR type, and
all other approaches are ill-advised.
It also says that DNS tree climbing is always bad. We might want to
reconsider whether the small amount of tree climbing specified in -03
is worth the hassle it will doubtless cause on the route from final
draft to RFC.
After implementing this, I can say that it seems to be mostly working
and that
what's mostly interfering is wildcarded SPF records. I'm guessing that
the deployers of SPF are likely to reasonably overlap with the deployers
of DKIM. On the other hand, I haven't ground the numbers to get any
statistics as to how much we should care.
Mike
R's,
John
-----------
From: Olaf Kolkman <olaf(_at_)nlnetlabs(_dot_)nl>
Subject: Correction: Impending publication: draft-iab-dns-choices-05
Date: Sat, 1 Mar 2008 15:23:00 +0000 (UTC)
Message-ID: <20080229175715(_dot_)DB88E3A6B2A(_at_)core3(_dot_)amsl(_dot_)com>
I managed to sneak in two errors:
1. a February 23 deadline, that should have been March 28
2. a link to version 03 of the document, that should have
been 05.
For completeness:
The IAB is ready to ask the RFC-Editor to publish
Design Choices When Expanding DNS
draft-iab-dns-choices-05
as an Informational RFC. This document provides a number of
considerations to assist application and protocol designers in
choosing a mechanism to store and retrieve data in the DNS. It treats,
among other things the pros and cons of using TXT records, and of
adding prefixes or suffixes to owner names. It argues that adding a
new Resource Record is the best solution to add new data to the DNS
and that the use of TXT Resource Records is the worst.
The IAB solicits comments by March 28, 2008. Please send
comments to the IAB (iab(_at_)iab(_dot_)org), or to
ietf(_at_)ietf(_dot_)org(_dot_)
The document can be found at
http://www.ietf.org/internet-drafts/draft-iab-dns-choices-05.txt
From the Abstract:
This note discusses how to extend the DNS with new data for a new
application. DNS extension discussions too often focus on reuse of
the TXT Resource Record Type. This document lists different
mechanisms to extend the DNS, and concludes that the use of a new DNS
Resource Record Type is the best solution.
Olaf Kolkman,
For the IAB.
_______________________________________________
NOTE WELL: This list operates according to
http://mipassoc.org/dkim/ietf-list-rules.html
_______________________________________________
NOTE WELL: This list operates according to
http://mipassoc.org/dkim/ietf-list-rules.html