Package: barman Version: 2.1-1 Severity: normal The barman package installs /etc/cron.d/barman, which runs a command as user barman.
At present the package doesn't take any special action to control where mail from cron is sent, so if there is any error output it will normally end up in /var/mail/barman where it's unlikely anyone will see it. I think the more usual approach in Debian packages is to arrange for this mail to be delivered to root, either by setting MAILTO=root in the cron.d file itself or by adding an entry in /etc/aliases for user barman from postinst. (The logcheck package provides an example of both of these things.)