Yahoo DMARC breakage

Wed Apr 9 21:49:27 UTC 2014

On 4/9/2014 5:24 PM, Valdis.Kletnieks at vt.edu wrote:
> On Wed, 09 Apr 2014 17:15:59 -0400, William Herrin said:
>
>> 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.
>>
>> 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 sort of programmer that writes out-of-mind software that doesn't
> employ the long well-known heuristics for detecting mailing lists
> (starting with checking Return-Path: for "owner-" and similar) will also
> likely disregard the Reply-To: header.  This Is Not A Good Thing.

The most "sane" out-of-mind response should only be sent *if* the
out-of-mind person is named explicitly as a recipient in the RFC822
header.  Anything To: somelist at somehost does not qualify :)

Jeff