I am having problems getting rkhunter to send the daily report to an outside email account under CentOS 7. I have installed postfix and fail2ban now sends ban messages as expected.

I have googled but so far failed to identify the error in my setup:

- /etc/aliases contain the correct mail alias for root

- /etc/rkhunter.conf has REPORT_EMAIL=themailadress and MAIL-ON-WARNING=themailadress

- /var/log/rkhunter/rkhunter.log does not contain any error messages

What have I missed?