Getting rkhunter failed emails in your email? Here is how to configure the email to send to a correct address.

Edit /etc/sysconfig/rkhunter:

nano /etc/sysconfig/rkhunter

# System configuration file for Rootkit Hunter which
# stores RPM system specifics for cron run, etc.
#
#    MAILTO= <email address to send scan report>
# DIAG_SCAN= no  - perform  normal  report scan
#            yes - perform detailed report scan
#                  (includes application check)

MAILTO=root@localhost
DIAG_SCAN=no

Change the email to your email.

# System configuration file for Rootkit Hunter which
# stores RPM system specifics for cron run, etc.
#
#    MAILTO= <email address to send scan report>
# DIAG_SCAN= no  - perform  normal  report scan
#            yes - perform detailed report scan
#                  (includes application check)

MAILTO=admin@yourdomain.com
DIAG_SCAN=no

Save and you are all set!