1. copy config-sample.pm config.pm
2. Customize config.pm for your need

test with following command

PATH=/usr/pkg_bulk/bin:/usr/pkg_bulk/sbin:${PATH} \
bulkbuild \ \

&& /PATH/TO/pbulk-diff-report > /tmp/mail

4. If above 3 looks good, EITHER

cat /tmp/mail | /usr/sbin/sendmail -t

OR

PATH=/usr/pkg_bulk/bin:/usr/pkg_bulk/sbin:${PATH} \ \

bulkbuild \ \

&& /PATH/TO/pbulk-diff-report | /usr/sbin/sendmail -t