cron. Why is stdout cron being written to my mail if the job is running as root?

Question

Debian

Hello, I set up rsync+cron autobackup in debian7. Logged in as root, I write
crontban -e.
0-59 * * * * rsync -avv /tmp/data /tmp/backup
Log out as root, log in as my user viktor.
less /var/mail/viktor
I see the stdout of pink.
Question: what does the user viktor have to do with it? I didn't point it out anywhere. I thought that by default letters are sent to the one who created the task in crontab, or to the one who is specified as the recipient.

Answer 1

grep ^root /etc/aliases.