[exim] Administrivia: mailman & exim.org changes

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Autor: Phil Pennock
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A: exim-users
Assumpte: [exim] Administrivia: mailman & exim.org changes
Folks,

Mailman on @exim.org is now version 2.1.23 with DMARC changes applied to
all lists:

dmarc_moderation_action = 1
dmarc_none_moderation_action = True

Furthermore, Exim on @exim.org is now DKIM-signing all outbound mail
which has a sender address in @exim.org. We do not publish a DMARC
policy at this time, and probably won't (for a long time / ever) but
DKIM is now pretty essential to not have @exim.org mail end up in the
spam folders of some large mail providers.

In blatant pimping of my own blog, two posts from 2012 on problems with
DMARC explain why `dmarc_none_moderation_action` matters:

https://bridge.grumpy-troll.org/2012/02/how-private-is-your-mailing-list-subscriber-list/
https://bridge.grumpy-troll.org/2012/07/mailing-list-recipient-disclosures-with-dmarc-redux/

Regards,
-Phil