Hi Elsy,
I've used bulk mail from another packages, this by using some of the bulk mail procs like:
[bulk_mail::new \
-from_addr $user_info(email)\
-send_date $send_date\
-date_format "YYYY MM DD HH24 MI SS" \
-subject "$subject" \
-message $message \
-query $query]
to send an email like you want, you could search on https://openacs.org/api-doc/ to find more specific info about how to use those procs.
In the UI of the package will appear all the messages that has been created.
