Some random thoughts.... 

-Yahoo policy change did not break all mailing lists, for instance most lists 
at apache.org are fine. Creating hyperbole drama does not offer tools to solve 
problems. 
-I remember a time, when adding a tag in the subject line was frown upon at 
IETF... even sending email with a mime/HTML part would get you many angry 
emails. At that time, if DKIM had existed, everything would have been fine, but 
lists changed... 
-Some list management software are not taking advantage of extended SMTP error 
codes, something that any ESP do, the SOFT vs HARD bounce concept. 
-RFC like anything human, can be changed, overwritten, etc... There is nothing 
which is sacred. I'm not saying that change should be easy, I'm just saying 
that change is not impossible. Laws have been turned, overturned and 
returned... This is part of progress.... and change creates pain. 
-IETF recent focus is on pervasive monitoring, increasing security, prevent 
identity theft,... DMARC is a tool that helps, it is aligned with IETF recent 
goals. It is deployed, widely used, proven beneficial, has still some problems, 
lets' fix them. 
-DMARC is not a silver bullet, but denying any new technology, because bad 
behavior cannot be eradicated, but simply mitigated is really strange to me. 
-Convenience or Security, make a choice... 
-I heard of numbers that mailing lists traffic is 10% of overall legitimate 
traffic. Some DMARC adopters have seen it was less than 1%. Your mileage may 
vary. 
-The problem has been highlighted for a year at least. Saying you should not 
publish a policy p=reject for a domain with users is not useful, this is not a 
legal nor even a regulatory constraint and there is no such thing as the RFC 
police. It was bound to happen, it came earlier than expected... 
-At the time of ADSP, I don't think anyone spotted the unsubscribe collateral 
damage problem, people just said mailing lists cannot work with ADSP and there 
is nothing you can do. If the problem was limited to "you cannot receive my 
email when I post to the list", it would have been my problem. I experimented 
on DMARC.org lists and discovered the collateral damage. I shared my 
experience. 
-As DMARC is widely adopted (unless ADSP was), some of us decided to build 
tools to remediate this upcoming problem in advance. There is code in mailman 
2.1.16 to make a list DMARC compliant via 2 options: one that please the people 
that the From: should be the original poster, one that displeases them. There 
is a patch to forbid people with a DMARC policy to subscribe/post to the list 
(not sure it is in the main code, this is not my hitch, but I respect people 
wanting to add it and I welcome them to work on it). I would have hoped we had 
a bit more time, because for instance this list is running on 2.1.15 and give 
or take 6 months, would have been upgraded naturally to 2.1.16 or even 2.1.17. 
It would have been easy for list admins to flip the switch. 
-A few lists have already been fixed very quickly, like the one run by Al, 
http://www.spamresource.com/2014/04/run-email-discussion-list-heres-how-to.html 
but there are other examples: 
http://groupserver.org/groups/development/messages/topic/5lLZaa1bSOyEmssFMFPeMX 
http://blog.threadable.com/how-threadable-solved-the-dmarc-problem , the 
"church list" has been fixed too, very quickly... 
-This could have been fixed a year ago, it is not like this was not a problem 
predicted... but until it is too late no one is motivated to fix issues in 
advance... 
-ISOC recently ran a survey on why operators are not present at IETF as they 
used to be... May be we prefer facts than judgements. We do also like 
bio-diversity: There is not one solution, but many, the standard is the 
solution most adopt eventually. IETF is making progress with anti-harassment 
and anti-bullying practices. 

So this is the IETF, we are engineers, we solve problems. Get working! 

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