Re: [Mailman-Users] Mailman & DMARC policy = none?

[Richard Damon]

On 12/31/18 3:08 PM, Mark Sapiro wrote:
> On 12/31/18 10:36 AM, David Gibbs via Mailman-Users wrote:
>> I'm curious as to how people are setting
>> 'dmarc_none_moderation_action'... which controls how Mailman handles
>> domains with a dmarc policy action of none (like gmail.com).
>>
>> Is there a compelling reason to set it to Yes so that messages from such
>> domains are munged or wrapped?
>
> No. There is no compelling reason to set it to Yes. It does not affect
> mail delivery. It only affects the reports sent by list recipient's
> service providers to the original From: domain which publishes p=none.
> Read the entire thread at
> . The originator of
> that bug report would like every Mailman list to apply
> dmarc_moderation_action unconditionally to posts From: domains that
> publish any DMARC policy including p=none.
>
> Implementing this as a list option does not satisfy the originator
> because he is concerned about mail From: his own domain which publishes
> p=none to lists operated by others which he does not control.
>
> It would have been better if this feature had never been implemented,
> and it is not in Mailman 3.
>
I would say that the 'backscatter' in the report is actual real
information telling the postmaster for the domain that their current
policies do not align with a a DMARC policy of reject (or maybe even
quarantine) as they are allowing there users to use RFC compliant
re-mailing systems (aka mailing lists) that don't naturally meet the
requirements of the (in my opinion poorly designed) DMARC system.

-- 
Richard Damon

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Re: [Mailman-Users] Mailman & DMARC policy = none?

[Mark Sapiro]

On 12/31/18 10:36 AM, David Gibbs via Mailman-Users wrote:
> 
> I'm curious as to how people are setting
> 'dmarc_none_moderation_action'... which controls how Mailman handles
> domains with a dmarc policy action of none (like gmail.com).
> 
> Is there a compelling reason to set it to Yes so that messages from such
> domains are munged or wrapped?


No. There is no compelling reason to set it to Yes. It does not affect
mail delivery. It only affects the reports sent by list recipient's
service providers to the original From: domain which publishes p=none.
Read the entire thread at
. The originator of
that bug report would like every Mailman list to apply
dmarc_moderation_action unconditionally to posts From: domains that
publish any DMARC policy including p=none.

Implementing this as a list option does not satisfy the originator
because he is concerned about mail From: his own domain which publishes
p=none to lists operated by others which he does not control.

It would have been better if this feature had never been implemented,
and it is not in Mailman 3.

-- 
Mark Sapiro The highway is for gamblers,
San Francisco Bay Area, Californiabetter use your sense - B. Dylan
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[Mailman-Users] Mailman & DMARC policy = none?

[David Gibbs via Mailman-Users]

Folks:

I'm curious as to how people are setting 'dmarc_none_moderation_action'... which 
controls how Mailman handles domains with a dmarc policy action of none (like 
gmail.com).


Is there a compelling reason to set it to Yes so that messages from such domains 
are munged or wrapped?


Thanks!

david

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