Re: DMARC methods in mailman --- [LEDE-DEV] DMARC related mass bounces / disabled subscriptions (fwd) Jo-Philipp Wich: [LEDE-DEV] DMARC related mass bounces / disabled subscriptions

Brian E Carpenter <brian.e.carpenter@gmail.com> Sat, 17 December 2016 22:14 UTC

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Subject: Re: DMARC methods in mailman --- [LEDE-DEV] DMARC related mass bounces / disabled subscriptions (fwd) Jo-Philipp Wich: [LEDE-DEV] DMARC related mass bounces / disabled subscriptions
To: Michael Richardson <mcr+ietf@sandelman.ca>
References: <25431.1481725548@obiwan.sandelman.ca> <5EF6F271-1CF7-4981-8E83-C7A7B49DB8F2@gmail.com> <CDE8A76C-ECD7-4370-9823-3C78144A8850@nohats.ca> <24005.1481827604@obiwan.sandelman.ca> <alpine.LRH.2.20.1612151513060.15183@bofh.nohats.ca> <20161216202704.glz5vgu773gqqgvm@thunk.org> <20161216203905.GD13486@mournblade.imrryr.org> <01Q8KHVOKE2C011H9Q@mauve.mrochek.com> <m21sx6u8sb.wl-randy@psg.com> <6D2E8F8E-1B02-46EA-B202-D23E5385CFF5@gmail.com> <20161217151451.hx5co6mjqmi2jakg@thunk.org> <13749.1482005985@dooku.sandelman.ca>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Sun, 18 Dec 2016 11:14:34 +1300
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On 18/12/2016 09:19, Michael Richardson wrote:
> 
> Theodore Ts'o <tytso@mit.edu> wrote:
>     > Yeah, it's the "sometimes mail gets lost" problem which is the main
>     > issue.  So it might actually be better to have the mailing list
>     > software refuse to accept a mailing list posting from a domain with a
>     > DMARC record, and it can be bounced back to the sender immediately
>     > with a "sorry, try again using some e-mail address that does not have
>     > DMARC support".
> 
> I really think that this is the right answer for our community.

I don't. Accept the posting but also send a friendly warning seems to do less damage.

> The DMARC policy is not to forward, and we should respect it.

Why does DMARC, which is a broken solution, deserve that much respect?

> When ARC gets standardized, we should implement it.

Assuming it solves the problem, sure. But if it doesn't, the problem will
get much worse.

    Brian