[UCIMC-Tech] Mailman 2.1.18? - DMARC: Yahoo vs internet mailing lists

[Jay Schubert]

I can't do the mailman upgraded, but I will mention that BTP really needs
this fixed.  We're dead in the water with our three lists until this is
resolved.


On Mon, May 5, 2014 at 11:56 PM, Stuart Levy <stuartnlevy at gmail.com> wrote:

>  Dear IMC Tech people,
>
> I'm sorry to bother you again, but am wondering if you can help with this,
> or if I can, or both.
>
> Having read last month that Yahoo's DMARC mail trust settings were
> breaking mailing lists including the IETF's own -
>     http://www.ietf.org/mail-archive/web/ietf/current/msg87153.html
> ... I wondered why it wasn't happening here.   Well, it is.
>
> The effect is that, when a Yahoo user writes to an IMC mailing list which
> has other Yahoo users as non-digest recipients, all of them - sender and
> receivers - get bounce messages.   The receivers get fatal bounces which
> immediately suspend them from the list.   This is happening now.
>
> There are workarounds for this in the latest version of Mailman, 2.1.18,
> released just this last weekend --
>
>     release notes here:
>      https://mail.python.org/pipermail/mailman-users/2014-May/076787.html
>
>     including this:
>
>       [...] a new Privacy options -> Sender filters -> dmarc_moderation_action
>       feature which applies to list messages where the From: address is in a
>       domain which publishes a DMARC policy of reject or possibly quarantine.
>       This is a list setting with values of Accept, Wrap Message, Munge From, Reject or Discard.
>       There is a new DEFAULT_DMARC_MODERATION_ACTION configuration setting to set the
>       default for this, and the list admin UI is not able to set an action
>       which is 'less' than the default.
>
> What would it take to get Mailman 2.1.18 on the chambana.net mailing list
> server?
>
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> IMC-Tech at lists.chambana.net
> https://lists.chambana.net/mailman/listinfo/imc-tech
>
>
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