[OSGeo] #3028: Migrate mailing lists to Mailman3

[OSGeo]

#3028: Migrate mailing lists to Mailman3
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 Reporter:  strk              |       Owner:  sac@…
     Type:  task              |      Status:  new
 Priority:  normal            |   Milestone:  Unplanned
Component:  SysAdmin/Mailman  |  Resolution:
 Keywords:                    |
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Comment (by neteler):

 The mailman3 looks very good indeed:

 e.g., https://discussion.fedoraproject.org/c/news/5
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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/3028#comment:1>
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