Yahoo DMARC breakage

Wed Apr 9 21:35:26 UTC 2014

On Wed, Apr 9, 2014 at 5:15 PM, William Herrin <bill at herrin.us> wrote:
> On Wed, Apr 9, 2014 at 4:05 PM, John Levine <johnl at iecc.com> wrote:
>> I'd say it's pretty badly broken if Yahoo intends for their web mail
>> to continue to be a general purpose mail system for consumers.  If
>> they want to make it something else, that's certainly their right, but
>> it would have been nice if they'd given us some advance warning so we
>> could take the yahoo.com addresses off our lists.
>
> Meh. This just means list software will have to rewrite the From
> header to "From: John Levine <nanog at nanog.org>" and rely on the
> Reply-To header for anybody who wants to send a message back to the
> originator.

Or perhaps DMARC can go back to it's original goal.

Go here: https://datatracker.ietf.org/doc/draft-kucherawy-dmarc-base/
Notice the early versions of the spec contained the word
"transactional", notice the current version has it removed.   Also
notice that one of the authors is from Yahoo!.

> Maybe this is a good thing - we can stop getting all the "sorry I'm
> out of the office" emails when posting to a list.

The OoO problem is a Client/MUA problem.  Most (other than Lotus
Notes, and some older copies of Outlook) properly tag OoO emails with
well-defined headers (RFC 3834).

-Jim P.