Re: [dmarc-ietf] Comment on DMARCbis, was draft-ietf-dmarc-psd

Jane Moneypenny <jane.moneypenny@protonmail.com> Thu, 05 March 2020 15:34 UTC

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To: Alessandro Vesely <vesely@tana.it>
From: Jane Moneypenny <jane.moneypenny@protonmail.com>
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Subject: Re: [dmarc-ietf] Comment on DMARCbis, was draft-ietf-dmarc-psd
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On Thu, Feb 13, 2020 at 11:25, Jane Moneypenny <jane.moneypenny=40protonmail.com@dmarc.ietf.org> wrote:

>> For a second issue, consider whether report generators should track policy
>> changes during the day and, in case, send multiple reports with different
>> PolicyPublished. Otherwise, PolicyPublished would be valid for only a part of
>> the reported rows, presumably the last. Is that acceptable?
>>
>
> Shall the "policy tracking" mechanism take into consideration:-
> - TTL,
> - DNS cache issues?
>
> Sent with ProtonMail Secure Email.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Thursday, February 6, 2020 7:44 PM, Alessandro Vesely <vesely@tana.it> wrote:
>
>> On Tue 04/Feb/2020 22:26:30 +0100 Murray S. Kucherawy wrote:
>>
>> > On Tue, Feb 4, 2020 at 1:20 PM Scott Kitterman sklist@kitterman.com wrote:
>> >
>> > > I agree on DMARCbis. I don't think advancing this draft has a significant
>> > > effect on that. Worst case, if DMARCbis is done before we can reach any
>> > > conclusions about PSD DMARC, then we publish DMARCbis without PSD DMARC in
>> > > it.
>>
>> +1, albeit I don't think DMARCbis arrives so quickly
>>
>> > I think we've always been assuming that PSD DMARC would be input to
>> > DMARCbis, so we were planning to start the latter but not close it until
>> > the former was completed. This is the first time I've seen a different
>> > suggestion.
>> > I'd love to hear more opinions about ordering of the work here. This seems
>> > like an ideal time to review and update our milestones.
>>
>> There are quite some issues about DMARC. Let me mention aggregate report
>> format first, as this brings out a third thing which can be done in parallel,
>> namely to publish http://dmarc.org/dmarc-xml/0.2.
>>
>> Various tweaks have been proposed, I think they're well summarized in
>> http://bit.ly/dmarc-rpt-schema
>>
>> For a second issue, consider whether report generators should track policy
>> changes during the day and, in case, send multiple reports with different
>> PolicyPublished. Otherwise, PolicyPublished would be valid for only a part of
>> the reported rows, presumably the last. Is that acceptable?
>>
>> Another case for sending multiple reports at once is on hitting size limits.
>> Is better to increase sending frequency instead? How to negotiate sending
>> frequency between report consumer's ri= and producer's conditions deserves some
>> discussion.
>>
>> I'm sure there's a bunch of other issues, and we should start to collect them.
>>
>> > > I don't see anything about PSD DMARC being inherently on the critical
>> > > path for DMARCbis. I suspect the current major obstacle to DMARCbis is
>> > > that the question of how to take the PSL out of the equation is unsolved,
>> > > despite one IETF WG that was supposed to be dedicated to the question.>>
>> > > I don't think not publishing PSD DMARC helps move DMARCbis forward, so I
>> > > think it's a false choice.>>
>> >
>> > I think what Dave proposed about PSL separation from DMARC is entirely
>> > appropriate and pragmatic, and in fact probably easy enough: DMARC is
>> > changed so that it says the organizational domain is determined using some
>> > process [currently] external to DMARC, and then a second document explains
>> > how that process is accomplished using the PSL (and/or PSD, depending on
>> > when the experiment result comes in). That's a fairly simple edit overall,
>> > and is actually probably minor and non-controversial compared to some of
>> > the other surgery that I believe is in the queue.
>>
>> +1, let DMARC core defineorganizational domain by characteristics. A second
>> document present a process, possibly demonstrating how the required
>> characteristics are met.
>>
>> Scott's I-D already outlines the characteristics of Branded and
>> Multi-organization PSDs, that the experimental processes are suited for.
>>
>> Best
>> Ale
>>
>> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>>
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>> dmarc@ietf.org
>> https://www.ietf.org/mailman/listinfo/dmarc
>
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