[OSGeo] #3028: Migrate mailing lists to Mailman3

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

The mailman3 looks very good indeed:

e.g., News & Announcements - Fedora Discussion
--
Ticket URL: <#3028 (Migrate mailing lists to Mailman3) – OSGeo;
OSGeo <Gter - OSGeo;
OSGeo committee and general foundation issue tracker.