Re: (DMARC) How a whitelist would work, was Why mailing lists

"John R Levine" <johnl@taugh.com> Fri, 18 April 2014 00:10 UTC

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Date: 17 Apr 2014 20:10:29 -0400
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From: "John R Levine" <johnl@taugh.com>
To: "Michael Richardson" <mcr+ietf@sandelman.ca>
Subject: Re: (DMARC) How a whitelist would work, was Why mailing lists
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References: <CE39F90A45FF0C49A1EA229FC9899B0507D45766@USCLES544.agna.amgreetings.com> <20140414214949.32126.qmail@joyce.lan> <CE39F90A45FF0C49A1EA229FC9899B0507D460CB@USCLES544.agna.amgreetings.com> <alpine.BSF.2.00.1404142150430.32657@joyce.lan> <CAL0qLwbPMm_i0fqNSGQPv=xZaiNASy=icsRNudaNJ_3PNtX3Og@mail.gmail.com> <alpine.BSF.2.00.1404151832460.38826@joyce.lan> <CAL0qLwZUptJVw85T2FjB2HRGoOvcOUHKiQXeadM0QE9BsFVM9w@mail.gmail.com> <CAKHUCzxpwS+nR9wRGOzU_83f7XabMr0pwB5x-MHrqM-28r80kw@mail.gmail.com> <CAKHUCzzw9mufrTCOBQOkRrZU6wOM21X8Y=FUEKf=qnzS9VESjA@mail.gmail.com> <alpine.BSF.2.00.1404161654430.2065@joyce.lan> <CAL0qLwYT_y5ksCP5DpHGXEK084zVg=6HfpJ2B2khkK7jDByZmQ@mail.gmail.com> <alpine.BSF.2.00.1404170008470.2194@joyce.lan> <9760.1397773072@sandelman.ca>
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> Are you saying that gmail and yahoo have to know about my lists.sandelman.ca
> before I can have gmail/yahoo members on my little local list?

Yeah.  It's clear from the DMARC summary reports I'm getting that the big 
mail systems already have a pretty good idea of where the mailing lists 
are, so it should be possible to pre-seed a whitelist so most people 
won't have to explicitly apply unless something screws up.

I agree this idea is not great, but all the plausible alternatives seem 
even less great.

Regards,
John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
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