Re: DMARC and yahoo

[Yoav Nir <[e-mail]>]

On Apr 22, 2014, at 4:13 AM, [e-mail] wrote:

> John Klensin writes:
> 
>> --On Monday, 21 April, 2014 08:26 +1200 Brian E Carpenter
>> <[e-mail]> 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 <[e-mail]>
To: [e-mail]
CC: Joe Blow <[e-mail]>
Subject Re: DMARC and yahoo

Joe Blow <[e-mail]> 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 <[e-mail]>
> Sent: Tuesday, April 22, 2014 12:30 PM
> To: [e-mail]
> Subject: Re: DMARC and yahoo
>
> I think you guys are making too much of this whole DMARC issue with Yahoo.