Re: [Tools-discuss] DMARC handling default for IETF mailing lists?

Henrik Levkowetz <henrik@levkowetz.com> Thu, 11 April 2019 21:28 UTC

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To: Carsten Bormann <cabo@tzi.org>, tools-discuss <tools-discuss@ietf.org>
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From: Henrik Levkowetz <henrik@levkowetz.com>
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Date: Thu, 11 Apr 2019 23:28:02 +0200
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Subject: Re: [Tools-discuss] DMARC handling default for IETF mailing lists?
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Hi Carsten,

On 2019-04-11 22:13, Carsten Bormann wrote:
> I just configured a mailing list and noticed that the configuration selection
> 
> 
> Replace the From: header address with the list's posting address to mitigate issues stemming from the original From: domain's DMARC or similar policies. 
> (Details for from_is_list)
> No	Munge From	Wrap Message
> 
> 
> defaulted to “No”.  Does the list admin have to set this to “Munge From” manually?
> (We don’t want to do that with known DMARC-bad source addresses, I believe.)
> Or does “No” mean “Munge, if needed”?

I believe 'No' means "Don't Munge", and given that we are running a separate
DMARC workaround, I believe this should not be set by default.  If you set
it, things should still work, but you'll replace our default DMARC workaround
with the Mailman approach.

We're still hoping to be able to deploy ARC, which should be better than both
the current default workaround and the Mailman workaround.


Best regards,

	Henrik

> 
> Grüße, Carsten
> 
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