Received Anacron bug report: /etc/cron.daily/couriergrey: Could not open database at /var/cache/couriergrey/deliveryattempts.gdbm run-parts: /etc/cron.daily/couriergrey exited with return code 1
Apparent workaround: Replace single instance of `daemon' in /etc/cron.daily/couriergrey with the user name `courier'.
