If you are getting nightly emails about the fact the upcp has run, and you no longer wish to see these, you can disable it by making the following change in the crontab
SSH to the server, and as root, type the following
This will open up the crontab for the root user.
Change the following line from:
28 0 * * * /usr/local/cpanel/scripts/upcp --cron
28 0 * * * /usr/local/cpanel/scripts/upcp --cron > /dev/null 2>&1
This will send the output to /dev/null instead of sending it via email to you.