+ dm...@ietf.org because Roland's responses should be
considered/captured there too.
Additional comment bottom-posted.
On 6/29/16 12:09 AM, Roland Turner via dmarc-discuss wrote:
Andreas Schulze wrote:
2)
a general point I'm still unsure about:
https://datatracker.ietf.org/doc/draft-ietf-dmarc-arc-usage say in 2.)
"If the mailing list implemented ARC, ..."
ARC *require* the list operator (Intermediary) to install new or update
existing - right?
No. ARC seeks to construct a situation in which forwarders and receivers will
each gain incremental benefit if they choose to implement; it neither requires
nor assumes implementation by any particular participant.
But the list operators fail over the last years to do so. Why should I expect
they will do now?
List operators typically cite two compelling reasons for not making changes to
support pre-ARC schemes:
1) the assumption that they're being asked to expend resources to solve someone
else's problems; and
2) even if resource constraints are ignored, each of the proposed changes
imposes harmful dilemmas (each option, including do nothing, is harmful).
ARC directly addresses (2). Unlike the measures for interoperating with earlier
schemes, adding an ARC-* header set does not in any way impede or alter the
traditional operation of mailing lists. Consequently: if list operators
perceive benefit in implementing ARC, then they're free to do so without having
to incur additional operational problems, in particular without changing user
experience.
(1) is not a big problem; for a list operator who doesn't have a problem that
ARC addresses there is no reason for them to implement ARC, and it doesn't
matter to anyone else if they don't.
- Roland
Well put, Roland. I was so concerned with addressing the frequently
asked question of "why will people upgrade" that I overlooked other
considerations in my earlier response.
--S.
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