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> Sun, 18 December 2016 19:20 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
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References: <25431.1481725548@obiwan.sandelman.ca> <6.2.5.6.2.20161217022643.0e830e78@elandnews.com> <60C5B0E2-95E6-4AE5-87FA-5C438F146181@fugue.com> <6.2.5.6.2.20161217081922.0b4350e0@elandnews.com> <A087FD45F16AB4DEB6C520F0@PSB> <6.2.5.6.2.20161218010701.0c297120@elandnews.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Mon, 19 Dec 2016 08:20:11 +1300
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On 18/12/2016 23:15, S Moonesamy wrote:
...
> Yes.  We might end up having to consider whether to attribute 
> semantics to the <display-name> as a way to solve the problem.  Let's 
> assume that 20% of IETF mailing list subscribers use a "p=reject" 
> domain name in the "From:" field and that they are no longer allowed 
> to post messages to the mailing list because of the policy advertised 
> by that sending domain.  What should the mailing list moderator do in 
> response to complaints from those subscribers?

Send them a canned message stating that the only solution available
to them is changing to a different From address that does not have
this issue. What else can they do?

But...

On 19/12/2016 06:05, Dave Crocker wrote:
...
> I believe some mailing lists have adjusted to detection of DMARC (maybe 
> just when p=reject?) for a given author by making author From: field 
> changes /only/ for such authors.  They don't make changes when mail is 
> from non-DMARC authors.

If ARC fails to solve the problem, I am certain the IETF will have no
choice but to do this (for both p=reject and p=quarantine, I suspect).

    Brian