postrm is in opensmtpd 5.4.1p1-1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46  | #!/bin/sh
set -e
case "$1" in
    purge)
	rm -rf /var/spool/opensmtpd
        for name in opensmtpd opensmtpq; do
            # By debian Policy ยง6.5, we may only rely on essential packages and
            # must fail gracefully if they are unavailable.
            # Use userdel/groupdel from passwd instead of deluser/delgroup from
            # the adduser package. This is because adduser depends on passwd,
            # but is of lesser priority.
            # Note that at the time of this writing, neither passwd nor adduser
            # are essential packages.
            userdel  ${name} >/dev/null 2>&1 || true;
            groupdel ${name} >/dev/null 2>&1 || true;
        done
	;;
    remove|failed-upgrade|abort-install|abort-upgrade|disappear|upgrade)
	;;
    *)
	echo "postrm called with unknown argument \`$1'" >&2
	exit 1
	;;
esac
# Automatically added by dh_installinit
if [ "$1" = "purge" ] ; then
	update-rc.d opensmtpd remove >/dev/null
fi
# In case this system is running systemd, we make systemd reload the unit files
# to pick up changes.
if [ -d /run/systemd/system ] ; then
	systemctl --system daemon-reload >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installdebconf
if [ "$1" = purge ] && [ -e /usr/share/debconf/confmodule ]; then
	. /usr/share/debconf/confmodule
	db_purge
fi
# End automatically added section
 |