[SAC] [OSGeo] #3011: Write recommendation for mailing list configuration regarding DKIM/DMARC/SPF

[OSGeo]

#3011: Write recommendation for mailing list configuration regarding
DKIM/DMARC/SPF
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 Reporter:  strk              |       Owner:  sac@…
     Type:  task              |      Status:  new
 Priority:  normal            |   Milestone:  Unplanned
Component:  SysAdmin/Mailman  |  Resolution:
 Keywords:  dkim, spf, dmarc  |
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Comment (by strk):

 The recipe in the above link is alrady in place for OSGeo, since 2017
 (thanks jef) but it's evidently not working as expected
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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/3011#comment:14>
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