/usr/lib/tmpfiles.d/mailman.conf is in mailman 1:2.1.26-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # path mode uid gid
d /run/mailman 0755 list list
d /run/lock/mailman 2775 root list
|