Thanks for the bug report.
This happens because of how systemd handles /var/run/. If you look at
the directory, you will see that it is actually a symlink to /run/.
This directory is populated on every boot. There are a few ways that
packages can choose in order to create directories under this
Added log file
** Attachment added: "/etc/logrotate.d/mailman"
https://bugs.launchpad.net/ubuntu/+source/mailman/+bug/1917336/+attachment/5471965/+files/mailman
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Checking the mailman package in Ubuntu Focal I see the logrotate file
installed by this package contains some postrotate scripts that might be
setting back the ownership to list:list. Take a look at
/etc/logrotate.d/mailman and try to make the ap
