dnf install epel-release dnf install pypolicyd-spf vi /etc/python-policyd-spf/policyd-spf.conf
policy-spf unix - n n - 0 spawn user=nobody argv=/usr/libexec/postfix/policyd-spf # 行頭は空白かタブ
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, check_policy_service unix:private/policy-spf # policy-spf_time_limit = 3600