We deploy MaxBulk Mailer via munki and have been doing so for years.
There's a new problem with 8.5.1 (including the "fixed" version released recently)
Munki installs this app as "root:admin":
drwxrwxr-x@ 13 root admin 442 Oct 24 05:24 MaxBulk Mailer
In doing this -- the application...