Re: Enable dmarc mitigations

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* Tom Hughes:

> On 02/05/2019 09:21, Florian Weimer wrote:
>> * Stephen J. Turnbull:
>>
>>> It's possible to do this only for domains that advertise p=reject.
>>> They deserve what they get.
>>>
>>> If there are any issues that seem like they can be addressed in
>>> upstream GNU Mailman (unfortunately, we don't carry a stick big enough
>>> to convince blockheaded mail domains not to publish p=reject), let me
>>> know and I'll push it with the Mailman devs.  No promises, of course.
>>
>> Gmail *recipients* (which includes most redhat.com subscribers these
>> days) need this rewriting as well.  Discarding mail is always a policy
>> decision carried out by the recipient, so it needs to be configurable
>> for mailing list subscribers.  The mailing list server cannot detect
>> this recipient behavior automatically.
>
> No, but if the mailing list server rewrites when the sender has a
> reject policy then the email gmail receives will no longer violate
> the policy so they won't put it in the spam folder.

Based on some reports, I don't think this is how the Gmail
implementation works.  It will discard mailing list mail for senders
with a DMARC policy that does not set p=reject, too.

Thanks,
Florian
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