ai postfix-policyd-spf-python
Create DNS txt record
v=spf1 mx -all
/etc/postfix/master.cf
policyd-spf unix - n n - 0 spawn
user=policyd-spf argv=/usr/bin/policyd-spf/etc/postfix/main.cf
policyd-spf_time_limit = 3600
smtpd_recipient_restrictions = check_policy_service unix:private/policyd-spf