Jodka Lemon's answer is correct:

• cron executes its job, and sends a result mail to "root@orion" (via "mail" or similar)
• the mail program cannot resolve host orion, since the hostname is not listed in "/etc/hosts" and not resolvable via dns.
• so the mailer writes the dead letter information

You will find the destination address of crons mail output in the crontab file which holds the "/etc/cron.hourly" entry. This sould be "/etc/crontab", i think...

Have Fun ... Gerhard

Jodka Lemon's answer is correct:

• cron executes its job, and sends a result mail to "root@orion" (via "mail" or similar)
• the MTA cannot resolve host orion, since the hostname is not listed in /etc/hosts and not resolvable via dns.
• so the mailer writes the dead letter information

You will find the destination address of crons mail output in the crontab file which holds the /etc/cron.hourly entry. This sould be /etc/crontab, I think...

Have Fun ... Gerhard