sudo -u list mailman digests -vp tells that the most recent digest has been sent, but nobody receives these digests. No mail or other log file has any clue what has happened.
digest_queue = config.switchboards['digest']
digest_queue <mailman.core.switchboard.Switchboard object at 0x7f9c8ed14940> digest_queue.files []
m.digest_send_periodic = True
Normal, non-digest messages are sent correctly. Administrative messages as well.
Using GNU Mailman 3.2.0 (La Villa Strangiato)
Where could I look for errors / stuck queues?
/var/lib/mailman3/lists /var/lib/mailman3/lists/mailman.unswolke.de /var/lib/mailman3/lists/mailman.unswolke.de/digest.2.3.mmdf /var/lib/mailman3/lists/mailman.unswolke.de/digest.3.2.mmdf /var/lib/mailman3/lists/mailman.unswolke.de/digest.4.2.mmdf /var/lib/mailman3/lists/mailman.unswolke.de/digest.2.6.mmdf /var/lib/mailman3/lists/mailman.unswolke.de/digest.2.4.mmdf /var/lib/mailman3/lists/mailman.unswolke.de/digest.4.1.mmdf /var/lib/mailman3/lists/mailman.unswolke.de/digest.3.1.mmdf /var/lib/mailman3/lists/mailman.unswolke.de/digest.mmdf /var/lib/mailman3/lists/mailman.unswolke.de/digest.4.3.mmdf