{"description": "To configure Postfix to restrict addresses to which it\nwill send mail, see:\n\n    <a xmlns='http://www.w3.org/1999/xhtml' href='http://www.postfix.org/SMTPD_ACCESS_README.html#danger'>http://www.postfix.org/SMTPD_ACCESS_README.html#danger</a>\n<br />\nThe full contents of <tt>smtpd_recipient_restrictions</tt> will\nvary by site, since this is a common place to put spam restrictions and other\nsite-specific options. The <tt>permit_mynetworks</tt> option allows all mail to\nbe relayed from the systems in <tt>mynetworks</tt>. Then, the\n<tt>reject_unauth_destination</tt> option denies all mail whose destination\naddress is not local, preventing any other systems from relaying. These two\noptions should always appear in this order, and should usually follow one\nanother immediately unless SMTP AUTH is used.", "warnings": [], "requires": [], "conflicts": [], "values": {}, "groups": {}, "rules": {}, "platform": "", "platforms": [], "inherited_platforms": ["system_with_kernel", "package[postfix]"], "cpe_platform_names": [], "title": "Enact SMTP Relay Restrictions", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/services/mail/postfix_harden_os/postfix_server_cfg/postfix_server_relay/postfix_server_mail_smtpd_relay_restrictions/group.yml"}