smtpd_delay_reject = yes

smtpd_helo_required = yes
smtpd_helo_restrictions =
permit_mynetworks,
check_helo_access
hash:/etc/postfix/helo_access,
reject_non_fqdn_hostname,
reject_invalid_hostname,
# reject_unknown_hostname,
permit

smtpd_sender_restrictions =
permit_sasl_authenticated,
permit_mynetworks,
reject_non_fqdn_sender,
reject_unknown_sender_domain,
permit

smtpd_recipient_restrictions =
reject_unauth_pipelining,
reject_non_fqdn_recipient,
reject_unknown_recipient_domain,
permit_mynetworks,
permit_sasl_authenticated,
#!!!!!!!! THIS IS THE LINE - DONT REMOVE IT !!!!!!!!!!
reject_unauth_destination,
#!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
reject_unknown_sender_domain,
check_sender_access
hash:/etc/postfix/sender_access,
check_policy_service unix:/var/spool/postfix/postgrey/socket,
check_policy_service unix:private/spfpolicy,
permit

check_policy_service inet:127.0.0.1:60000