Its not the Cron job doing the email send to:
No?
From: root@****.com (Cron Daemon)
Subject: Cron <centovacast@server8> /usr/local/centovacast/bin/ccmanage cronjob all >/dev/null
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/usr/local/centovacast>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=centovacast>
X-Cron-Env: <USER=centovacast>
"Cron Daemon" in the from line, "Cron" in the subject line, and Cron environment variables say otherwise.
Some how the Cron Job is trying to send the to:
centovacast@server8.mmrhosting.com
That's correct. Unless you configure it to do differently, cron sends emails to [username-of-the-account-the-cron-job-belongs-to]@[hostname-of-the-machine]. In this case, the user account is "centovacast" and the hostname is "server8.mmrhosting.com".
As I explained previously, "man cron" and "man crontab" will tell you all this and more, as well as how to change it which usually involves adding a "MAILTO" line to your crontab.
Again, nothing to do with Centova Cast. That's just how cron works.