An XCCDF Group - A logical subset of the XCCDF Benchmark
alternatives
postfix
$ sudo yum install postfix
sendmail
$ sudo yum erase sendmail
$ sudo systemctl enable postfix.service
$ sudo echo "root: " >> /etc/aliases $ sudo newaliases
$ sudo grep "postmaster:\s*root$" /etc/aliases postmaster: root
/etc/postfix/main.cf
relayhost
relayhost =
inet_interfaces
inet_interfaces =
$ sudo postconf -e 'smtpd_client_restrictions = permit_mynetworks,reject'
s-nail
$ sudo yum install s-nail