Yahoo DMARC breakage

Valdis.Kletnieks at Valdis.Kletnieks at
Wed Apr 9 21:24:44 UTC 2014

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>" 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.
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