https://bugzilla.wikimedia.org/show_bug.cgi?id=64818

            Bug ID: 64818
           Summary: Mitigate strict DMARC policy on the mailing lists
           Product: Wikimedia
           Version: wmf-deployment
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: Unprioritized
         Component: Mailing lists
          Assignee: wikibugs-l@lists.wikimedia.org
          Reporter: seb35wikipe...@gmail.com
                CC: b...@caseybrown.org, jalexan...@wikimedia.org,
                    pbeaude...@wikimedia.org, thehelpfulonew...@gmail.com,
                    twkozlow...@gmail.com
       Web browser: ---
   Mobile Platform: ---

Try to become more DMARC-complient on the mailing lists to improve
deliverability, particularly given Yahoo and AOL recently switched to a policy
p=reject, preventing these users from sending emails to the mailing lists.

This bug is partly wontfix since this is linked to an upstream Mailman for a
proper resolution, but could be partly mitigated by changing some configuration
parameters, although there is no proper solution. I open this bug partly to
isolate this mailing lists issue from other DMARC-related bugs (56414, 59731,
64795), and properly tracking the issue.

Two mitigations:

1/
http://www.spamresource.com/2014/04/run-email-discussion-list-heres-how-to.html
is a way to mitigate the issue, although the main point is to change the From:
header to a fixed address like wikitec...@lists.wikimedia.org (quite disruptive
for all users).

2/ http://www.ietf.org/mail-archive/web/ietf/current/msg87176.html proposes to
rewrite Yahoo (+AOL) sending addresses from some...@yahoo.com to
some...@yahoo.com.invalid to bypass DMARC.

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