/etc/cron.daily/couriergrey is in couriergrey 0.3.2-5build2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | #!/bin/bash
if [ ! -x /usr/lib/courier/filters/couriergrey ]; then exit 0
fi
# This is couriergrey's database cleanup cron job.
su -s /bin/sh -c "/usr/lib/courier/filters/couriergrey -e 365" daemon \
> /dev/null || exit $?
|