[170822] in North American Network Operators' Group
Re: autoresponding to Yahoo DMARC breakage
daemon@ATHENA.MIT.EDU (John R. Levine)
Wed Apr 9 21:54:51 2014
Date: 9 Apr 2014 19:54:21 -0600
From: "John R. Levine" <johnl@iecc.com>
To: "William Herrin" <bill@herrin.us>
In-Reply-To: <CAP-guGUMF5t-a014uLr7FPmWScs=4ddKqVd8P-JSSxVczFU6oQ@mail.gmail.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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> On Wed, Apr 9, 2014 at 6:11 PM, <bmanning@vacation.karoshi.com> wrote:
>> and just how is an algorithm supposed to detect that
>> <jeff-kell@utc.edu> is a single human and not a list?
>
> If the autoresponder is sane, it looks for:
>
> List-Id: North American Network Operators Group <nanog.nanog.org>
Yes, there are a lot of headers that give you a hint that a message is
from a list. But the heuristic to look for the recipient's address on the
To: line works so well, along with a little rate limiting, that you don't
really need anything else.
Regards,
John Levine, johnl@iecc.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. http://jl.ly
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