Re: DMARC and yahoo

[Yoav Nir <ynir.ietf@xxxxxxxxx>]

On Apr 22, 2014, at 4:13 AM, ned+ietf@xxxxxxxxxxxxxxxxx wrote:

John Klensin writes:

--On Monday, 21 April, 2014 08:26 +1200 Brian E Carpenter
<brian.e.carpenter@xxxxxxxxx> wrote:

IMO, this is quite elegant.  The Yahoo users continue to get
the messages, you don't get cluttered by rejection-related
complaints, and those Yahoo users who don't like the digest
form can take it up with Yahoo or find other accounts to use.

Unfortunately they can switch themselves back to normal mode
too. Digest mode is user-settable, and is very annoying because
it munges the Subject header. What's really needed is a
DMARC-safe mode (per subscriber) that optionally rewrites the
From.

As others have pointed out, the only way digest mode solves the problem at hand
is if you force it on every message *from* a domain with a p=reject
policy regardless of recipient.

That’s one way to deal with it. The MLM software could identify such messages, and send them to the list recipients Looking like a forwarded message:

From: ietf <ietf-bounces@xxxxxxxx>

To: ietf@xxxxxxxx

CC: Joe Blow <joeblow@xxxxxxxxx>

Subject Re: DMARC and yahoo

Joe Blow <joeblow@xxxxxxxxx> sent a message from a domain with a p=reject policy. To learn more about this issue, go to https://www.ietf.org/mailman/dmarc-issue

Begin forwarded message: 

> From: Joe Blow <joeblow@xxxxxxxxx>

> Sent: Tuesday, April 22, 2014 12:30 PM

> To: ietf@xxxxxxxx

> Subject: Re: DMARC and yahoo

>

> I think you guys are making too much of this whole DMARC issue with Yahoo.