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#894001
smtpd_delay_reject = yes
#strict_rfc821_envelopes = yes
#not strictly necessary, can reject legit mail from misconfigured hosts
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,
#can cause high rejection of valid mail from misconfigured hosts
permit
disable_vrfy_command = yes
smtpd_sender_restrictions =
permit_sasl_authenticated,
permit_mynetworks,
reject_non_fqdn_sender,
reject_unknown_sender_domain,
# rDNS Check
# check_policy_service unix:private/rdns-policy
permit
smtpd_recipient_restrictions =
reject_non_fqdn_recipient,
reject_unknown_recipient_domain,
permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
# ABOVE ENTRY REQUIRED to prevent open relay!
# check_recipient_access
# hash:/usr/local/etc/postfix/recipient_access,
# RBLs
reject_rbl_client list.dsbl.org,
reject_rbl_client zen.spamhaus.org,
# SPF check (not installed)
# check_policy_service unix:private/spfpolicy
# Postgrey (not installed)
# check_policy_service inet:127.0.0.1:10023
permit
smtpd_data_restrictions =
reject_unauth_pipelining
permit