[170839] in North American Network Operators' Group
Re: Yahoo DMARC breakage
daemon@ATHENA.MIT.EDU (Dave Crocker)
Thu Apr 10 07:48:05 2014
Date: Thu, 10 Apr 2014 06:45:41 -0500
From: Dave Crocker <dhc2@dcrocker.net>
To: Jimmy Hess <mysidia@gmail.com>, Miles Fidelman <mfidelman@meetinghouse.net>
In-Reply-To: <CAAAwwbXZqT6-GUcwm=UF+PRvC+tG0BxcwDY+6uzvcpoMj=aBZA@mail.gmail.com>
Cc: NANOG list <nanog@nanog.org>
Reply-To: dcrocker@bbiw.net
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 4/9/2014 11:54 PM, Jimmy Hess wrote:
> Basic functionality is seriously and utterly broken --- that DMARC
> doesn't have a good answer for such situations, is a major indicator
> of its immaturity, in the sense that it is "Too specific" a solution
> and cannot apply to e-mail in general.
>
> If it were mature: a mechanism would be provided that would allow
> mailing lists to function without breaking changes such as
> substituting From:.
On 4/9/2014 11:54 PM, Jimmy Hess wrote:> Basic functionality is
seriously and utterly broken --- that DMARC doesn't
> have a good answer for such situations, is a major indicator of its
> immaturity, in the sense that it is "Too specific" a solution and
> cannot apply to e-mail in general.
>
> If it were mature: a mechanism would be provided that would allow
> mailing lists to function without breaking changes such as
> substituting From:.
Every tool has limitations.
An 18-wheeler truck is not broken or immature because it fails to corner
like a Maserati. A Maserati is not broken or immature because it does
not have the carrying capacity of an 18-wheeler.
DMARC was designed to handle a particular usage scenario and its
limitations have been carefully documented.
Or perhaps we need to declare email broken and immature because it does
not (yet) satisfy a long list of entirely reasonable functional
requirements, such as, ummm, author authentication?
Long deployment and use and deep knowledge don't matter; only satisfying
someone's list of requirements does?
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
