"Mailing lists usually do not take authorship of the emails they relay. It means the From: header in the email will not contain the domain name of the mailing list, and if the mailing list add DKIM to all its emails, DKIM d= will not match. If the domain in the From: header is from an organization that publishes a DMARC record, the email is likely to not be delivered."

I do not run a mailing list server at the moment so I did not investigate how to work around it.. Russell seems to know (and I guess I know how he does it;-)

https://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/introduction-archguide.html

"If a problem is not completely understood, it is probably best to provide no solution at all."

This would have saved us from a few improvements over the last years.. DMARC seems to be one of them.

Regards

Peter

On Wed, Nov 11, 2015 at 3:40 PM, Craig Sanders via luv-talk <luv-talk@luv.asn.au> wrote:

On Wed, Nov 11, 2015 at 03:10:06PM +1100, Russell Coker wrote:
> In Kmail "Reply" goes to the list, "Reply to all" goes to list and
> sender, "reply to authir" goes to the sender, and "reply to mailing
> list" goes to the list. In K9 "reply" goes to the sender and "reply
> to all" goes to the list as well. It seems to work in a reasonable
> way.

well, then, it's a good thing that absolutely everybody in the world
uses either Kmail or K9. And no-one ever needs to specify their own
preferred (or only viable/working) address in the Reply-To: header.

Reply-To munging is broken, it destroys the sender's intent (and makes
it *impossible* to contact them) when you override their Reply-To with
yours. Mailman already uses the correct header Mail-Followup-To:
(and Sender: for more primitive MUAs).

Munging the From: header is similarly broken.

> That is not the problem we are trying to solve. The issue is that
> more of the big sending domains are using DMARC entries (yahoo is one)
> and more of the big receiving domains are rejecting mail based on them
> (gmail is one).

there has to be another solution because the one you have chosen is broken.

craig

ps: surrendering to the arbitrary decrees and whims of giant
corporations seems like a bad idea to me.

--
craig sanders <cas@taz.net.au>

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