Re: DMARC and yahoo
Theodore Ts'o <tytso@mit.edu> Wed, 16 April 2014 02:38 UTC
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Date: Tue, 15 Apr 2014 22:38:13 -0400
From: Theodore Ts'o <tytso@mit.edu>
To: Michael Richardson <mcr+ietf@sandelman.ca>
Subject: Re: DMARC and yahoo
Message-ID: <20140416023813.GA21807@thunk.org>
References: <CAKW6Ri6OUmxGaBOGR2hoWpDOGWsVQ9tQ2Q9ogkT5wzFhFJLBbQ@mail.gmail.com> <534D9C2C.8010606@gmail.com> <20140415214348.GL4456@thunk.org> <1397607352.389753533@f361.i.mail.ru> <534DCFFB.4080102@gmail.com> <20140416012205.GC12078@thunk.org> <24986.1397615002@sandelman.ca>
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On Tue, Apr 15, 2014 at 10:23:22PM -0400, Michael Richardson wrote: > So, as a WG chair, a person known to me just tried to post to the list > From a brand new yahoo.com mail account. They aren't subscribed with that > address. I would normally just approve, and add them... > > It seems to me that I must now actually reject, because it would affect other > subscribers. > > I'm now thinking that we need to remove all the @yahoo.com addresses from > posting to ietf mailing lists. So on my mailman configuration (which I believe is the default), if alice@hotmail.com receives 5 hard fail bounces she will get automatically suspended from the mailing list. So a single e-mail from a @yahoo.com address won't cause damage, and if seven days go by without any further bounce messages, the "bounce counter" gets reset to zero. The problem comes if you have many e-mail messages from yahoo.com users (which according to yahoo and the DMARC cheerleaders, shouldn't happen happen, because mailing list traffic is "insignificant" :-). So this is what I've done on my church mailman setup. First of all, I've disabled bounce processing, so even if a yahoo.com posting slips by, it won't do any damage. (It does mean more bounce mail will end up going to the list-owner address, which I'll then have to manually deal with, but as a short-term hack, I'm willing to live with it). Secondly, I've taken all of the yahoo.com users, and set the moderation bit, so if they do send e-mail, it will be held for moderation. I can then manually cut and paste their e-mail and send it to them on their behalf. Unfortunately, about 25% of my church's governing board is using Yahoo, and so this is something I was willing to do as a short-term remediation, since I didn't want to just bounce their e-mail or let their e-mail cause other Vestry members to be removed from the mailing list. In the long-term, I'm going to try to convince some of them to move to another mail provider, or at least use another mail provider for church business. I'll also try to see if I can get a patch to mailman so it will do the "username@yahoo.com" -> "username@yahoo.com.INVALID" from header rewrite. But that's not something I can do on short notice, since this is a rather busy week for me. I don't know what the ietf.org secretariat should do. My short-term remediations aren't very scalable, so what works for a small church probably wouldn't work for the entire IETF. What a mess. - Ted
- DMARC from the perspective of the listadmin of a … Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Dave Crocker
- Re: DMARC from the perspective of the listadmin o… Michael Richardson
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Hector Santos
- Re: DMARC from the perspective of the listadmin o… Brian E Carpenter
- Re: DMARC from the perspective of the listadmin o… Theodore Ts'o
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Mark Andrews
- Re: DMARC from the perspective of the listadmin o… Hector Santos
- Re: DMARC from the perspective of the listadmin o… Douglas Otis
- Re: DMARC from the perspective of the listadmin o… Dave Crocker
- Re: DMARC from the perspective of the listadmin o… Andrew G. Malis
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… John Levine
- Re: DMARC from the perspective of the listadmin o… Brian E Carpenter
- Re: DMARC from the perspective of the listadmin o… Brian E Carpenter
- Re: DMARC from the perspective of the listadmin o… Theodore Ts'o
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Dick Franks
- Re: DMARC from the perspective of the listadmin o… Dick Franks
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re[2]: DMARC and yahoo mohammed serrhini
- Re: DMARC from the perspective of the listadmin o… Hector Santos
- Re: DMARC from the perspective of the listadmin o… Dick Franks
- Re: DMARC from the perspective of the listadmin o… Murray S. Kucherawy
- Re: DMARC from the perspective of the listadmin o… Dave Crocker
- Re: DMARC and yahoo Doug Royer
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Murray S. Kucherawy
- Re: DMARC from the perspective of the listadmin o… Warren Kumari
- Re: DMARC from the perspective of the listadmin o… Murray S. Kucherawy
- RE: DMARC from the perspective of the listadmin o… MH Michael Hammer (5304)
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC and yahoo Theodore Ts'o
- Re: DMARC from the perspective of the listadmin o… Dick Franks
- Re: DMARC from the perspective of the listadmin o… Brian E Carpenter
- Re: DMARC from the perspective of the listadmin o… Rolf E. Sonneveld
- Re: DMARC from the perspective of the listadmin o… Dave Crocker
- Re: DMARC from the perspective of the listadmin o… Murray S. Kucherawy
- Re: DMARC from the perspective of the listadmin o… Murray S. Kucherawy
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Dave Cridland
- Re: DMARC from the perspective of the listadmin o… Dick Franks
- What I've been wondering about the DMARC problem Brian E Carpenter
- Re: What I've been wondering about the DMARC prob… Doug Barton
- Re: DMARC and yahoo Doug Royer
- Re: What I've been wondering about the DMARC prob… Miles Fidelman
- Re: What I've been wondering about the DMARC prob… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Ted Lemon
- Re: What I've been wondering about the DMARC prob… Theodore Ts'o
- Re: DMARC from the perspective of the listadmin o… Scott Kitterman
- Re: DMARC and yahoo Theodore Ts'o
- What I've been wondering about the DMARC problem Abdussalam Baryun
- Re: What I've been wondering about the DMARC prob… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Sabahattin Gucukoglu
- Re: What I've been wondering about the DMARC prob… Seth Johnson
- Re: What I've been wondering about the DMARC prob… Seth Johnson
- RE: What I've been wondering about the DMARC prob… l.wood
- Re: DMARC and yahoo Douglas Otis
- Re: What I've been wondering about the DMARC prob… Seth Johnson
- Re: What I've been wondering about the DMARC prob… Dave Crocker
- Re: DMARC from the perspective of the listadmin o… Hector Santos
- Re: What I've been wondering about the DMARC prob… Miles Fidelman
- Re: What I've been wondering about the DMARC prob… Seth Johnson
- Re: What I've been wondering about the DMARC prob… Miles Fidelman
- Re: What I've been wondering about the DMARC prob… Paul Ferguson
- Re: What I've been wondering about the DMARC prob… Miles Fidelman
- Re: What I've been wondering about the DMARC prob… Hector Santos
- Re: What I've been wondering about the DMARC prob… Miles Fidelman
- RE: What I've been wondering about the DMARC prob… MH Michael Hammer (5304)
- Re: What I've been wondering about the DMARC prob… Hector Santos
- RE: What I've been wondering about the DMARC prob… MH Michael Hammer (5304)
- Re: What I've been wondering about the DMARC prob… Brian E Carpenter
- Re: DMARC and yahoo Doug Royer
- Re: DMARC and yahoo Theodore Ts'o
- Re: DMARC and yahoo Michael Richardson
- Re: DMARC and yahoo Theodore Ts'o
- Re: What I've been wondering about the DMARC prob… Sabahattin Gucukoglu
- Re: DMARC and yahoo Stephen Farrell
- Re: DMARC and yahoo Hector Santos
- Re: DMARC and yahoo Randy Bush
- Re: DMARC and yahoo Yoav Nir
- RE: DMARC and yahoo MH Michael Hammer (5304)
- Re: DMARC and yahoo Theodore Ts'o
- RE: DMARC and yahoo MH Michael Hammer (5304)
- Re: What I've been wondering about the DMARC prob… Jim Fenton
- Re: What I've been wondering about the DMARC prob… Brian E Carpenter
- Re: DMARC and yahoo Miles Fidelman
- RE: DMARC and yahoo l.wood
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC from the perspective of the listadmin o… Douglas Otis
- Re: DMARC from the perspective of the listadmin o… John C Klensin
- Re: What I've been wondering about the DMARC prob… Sabahattin Gucukoglu
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: What I've been wondering about the DMARC prob… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Hector Santos
- Re: What I've been wondering about the DMARC prob… Brian E Carpenter
- Re: What I've been wondering about the DMARC prob… Theodore Ts'o
- Re: What I've been wondering about the DMARC prob… John Levine
- Re: DMARC from the perspective of the listadmin o… Martin Rex
- Re: DMARC from the perspective of the listadmin o… Doug Barton
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC from the perspective of the listadmin o… Murray S. Kucherawy
- Re: DMARC from the perspective of the listadmin o… John Levine
- Re: What I've been wondering about the DMARC prob… Murray S. Kucherawy
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: What I've been wondering about the DMARC prob… Sabahattin Gucukoglu
- Re: What I've been wondering about the DMARC prob… Sabahattin Gucukoglu
- RE: DMARC from the perspective of the listadmin o… MH Michael Hammer (5304)
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- RE: DMARC from the perspective of the listadmin o… MH Michael Hammer (5304)
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Doug Barton
- Re: DMARC from the perspective of the listadmin o… Theodore Ts'o
- Re: DMARC from the perspective of the listadmin o… Randy Bush
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC from the perspective of the listadmin o… John C Klensin
- Re: What I've been wondering about the DMARC prob… ned+ietf
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC from the perspective of the listadmin o… Hector Santos
- Re: DMARC from the perspective of the listadmin o… John C Klensin
- Re: DMARC from the perspective of the listadmin o… Pete Resnick
- Re: DMARC and yahoo Jeffrey Altman
- Re: DMARC and yahoo John Levine
- Re: DMARC and yahoo Hector Santos
- Re: DMARC and yahoo John C Klensin
- Re: DMARC and yahoo Brian E Carpenter
- One size doesn't fit all [Re: DMARC ....] Brian E Carpenter
- Re: DMARC from the perspective of the listadmin o… Dave Crocker
- Somebody always claims something (was Re: DMARC f… Dave Crocker
- Re: DMARC and yahoo Doug Barton
- Re: DMARC and yahoo Hector Santos
- Re: DMARC and yahoo Theodore Ts'o
- RE: DMARC and yahoo Christian Huitema
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC and yahoo Yoav Nir
- Re: DMARC and yahoo John Levine
- Re: DMARC and yahoo Dave Crocker
- Re: What I've been wondering about the DMARC prob… Murray S. Kucherawy
- Re: DMARC and yahoo Doug Royer
- Re: What I've been wondering about the DMARC prob… ned+ietf
- Re: DMARC and yahoo Dave Crocker
- Re: DMARC and yahoo Douglas Otis
- Re: What I've been wondering about the DMARC prob… John Levine
- Re: DMARC and yahoo Brian E Carpenter
- Re: What I've been wondering about the DMARC prob… Murray S. Kucherawy
- Re: DMARC and yahoo Rolf E. Sonneveld
- Re: What I've been wondering about the DMARC prob… ned+ietf
- Re: DMARC and yahoo Douglas Otis
- Re: DMARC from the perspective of the listadmin o… Doug Barton
- Re: DMARC from the perspective of the listadmin o… Martin Rex
- Re: DMARC from the perspective of the listadmin o… Doug Barton
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Martin Rex
- Re: DMARC from the perspective of the listadmin o… Scott Kitterman
- Re: DMARC from the perspective of the listadmin o… Douglas Otis
- Re: DMARC from the perspective of the listadmin o… Scott Kitterman
- Re: DMARC from the perspective of the listadmin o… Martin Rex
- Re: DMARC from the perspective of the listadmin o… John R Levine
- Re: DMARC from the perspective of the listadmin o… Ted Lemon
- Re: DMARC from the perspective of the listadmin o… ned+ietf
- Re: DMARC from the perspective of the listadmin o… Dave Crocker
- Re: DMARC from the perspective of the listadmin o… Martin Rex
- Re: DMARC from the perspective of the listadmin o… Douglas Otis
- Re: DMARC from the perspective of the listadmin o… Hector Santos
- The IETF environment (was: Re: DMARC from the per… ned+ietf
- Re: The IETF environment Dave Crocker
- RE: The IETF environment Adrian Farrel
- Re: The IETF environment Miles Fidelman
- Re: The IETF environment Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Miles Fidelman
- Re: DMARC from the perspective of the listadmin o… Murray S. Kucherawy
- Re: The IETF environment Abdussalam Baryun
- Re: The IETF environment Dale R. Worley
- Re: The IETF environment Brian E Carpenter
- Re: The IETF environment Dave Crocker
- Re: The IETF environment Phillip Hallam-Baker
- Re: DMARC from the perspective of the listadmin o… Hector Santos
- Re: The IETF environment S Moonesamy
- Re: The IETF environment Dave Crocker
- Re: The IETF environment Miles Fidelman
- RE: The IETF environment Christian Huitema
- Re: The IETF environment S Moonesamy
- Re: The IETF environment Miles Fidelman
- Workshop effects [Re: The IETF environment] Brian E Carpenter
- Re: Workshop effects [Re: The IETF environment] Abdussalam Baryun