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autoresponding to Yahoo DMARC breakage
- Subject: autoresponding to Yahoo DMARC breakage
- From: johnl at iecc.com (John R. Levine)
- Date: 9 Apr 2014 19:54:21 -0600
- In-reply-to: <CAP-guGUMF5t-a014uLr7FPmWScs=4ddKqVd8P-JSSxVczFU6oQ@mail.gmail.com>
- References: <[email protected]> <[email protected]> <CAP-guGXZSvDiNnKwgMPac8FY=UM8xGMXs85CpoOuJgtfzJwcCg@mail.gmail.com> <[email protected]> <[email protected]> <[email protected]> <CAP-guGUMF5t-a014uLr7FPmWScs=4ddKqVd8P-JSSxVczFU6oQ@mail.gmail.com>
> On Wed, Apr 9, 2014 at 6:11 PM, <bmanning at vacation.karoshi.com> wrote:
>> and just how is an algorithm supposed to detect that
>> <jeff-kell at 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 at 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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