[dns-operations] Mailing List Behaviour Change

Doug Barton dougb at dougbarton.email
Sat Apr 6 17:21:11 UTC 2019

On 3/31/19 3:32 PM, Jim Popovitch wrote:
> On Sun, 2019-03-31 at 17:16 -0400, Matthew Pounsett wrote:
>> This message is crossposted to multiple lists. Apologies to those who see it
>> more than once.
>> DNS-OARC administrates many public mailing lists in the DNS operations space.
>> Beginning on Wednesday, April 3, 2019 at approximately 20:00 UTC, OARC will
>> change the way all mailing lists handle mail from subscribers in
>> DMARC-protected domains.  For any such email with a 'reject' or 'quarantine'
>> policy, we will begin wrapping the message in a new email with From and
>> Reply-To headers set to the list address.  This is required to prevent email
>> from DMARC-protected domains being bounced by destination mail servers.
> It's about time. ;-)  There really shouldn't be any problem in doing this,
> many other lists have been doing this for a few years now, without issue.
> Might I suggest that you also wrap messages with a p=none policy.  Per the
> spec, p=none is for testing, but  that doesn't mean "do nothing".  Wrap the
> p=none messages so that those senders too will see how DMARC impacts them.


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