sovereign/roles/mailserver/templates/etc_postfix_main.cf.j2

# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Modified as per http://sealedabstract.com/code/nsa-proof-your-e-mail-in-2-hours/
 
smtpd_banner = $myhostname ESMTP $mail_name
biff = no
 
# Accept messages up to 50MB
message_size_limit = 51200000

# appending .domain is the MUA's job.
append_dot_mydomain = no
 
# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
 
readme_directory = no

# antispam
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks, reject_invalid_hostname
smtpd_sender_restrictions = reject_unknown_address
disable_vrfy_command = yes
strict_rfc821_envelopes = yes
invalid_hostname_reject_code = 554
multi_recipient_bounce_reject_code = 554
non_fqdn_reject_code = 554
relay_domains_reject_code = 554
unknown_address_reject_code = 554
unknown_client_reject_code = 554
unknown_hostname_reject_code = 554
unknown_local_recipient_reject_code = 554
unknown_relay_recipient_reject_code = 554
unknown_virtual_alias_reject_code = 554
unknown_virtual_mailbox_reject_code = 554
unverified_recipient_reject_code = 554
unverified_sender_reject_code = 554
 
# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/wildcard_combined.pem
smtpd_tls_key_file=/etc/ssl/private/wildcard_private.key
smtpd_use_tls=yes
#smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
#smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_tls_auth_only = yes
smtp_tls_security_level = may
smtp_tls_loglevel = 2
smtpd_tls_received_header = yes
smtp_tls_note_starttls_offer = yes
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt

smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_sasl_security_options = noanonymous

smtpd_recipient_restrictions =
  permit_sasl_authenticated,
  permit_mynetworks,
  reject_unauth_pipelining,
  reject_unauth_destination,
  reject_invalid_hostname,
  reject_non_fqdn_hostname,
  reject_non_fqdn_recipient,
  reject_unknown_recipient_domain,
  check_policy_service inet:127.0.0.1:10023,
  permit

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.
 
myhostname = {{ mail_server_hostname }}
myorigin = $mydomain
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 {{ ' '.join(friendly_networks) }}
#mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

# dovecot mysql
virtual_transport = dovecot
dovecot_destination_recipient_limit = 1
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf
local_recipient_maps = $virtual_mailbox_maps

# OpenDKIM
smtpd_milters = inet:127.0.0.1:8891
non_smtpd_milters = $smtpd_milters
milter_default_action = accept

# new settings for dspam: only scan one mail at a time, localhost doesn't get scanned, everything else does
dspam_destination_recipient_limit = 1
smtpd_client_restrictions =
  permit_sasl_authenticated
  check_client_access pcre:/etc/postfix/dspam_filter_access

# Postscreen
postscreen_access_list = permit_mynetworks
postscreen_dnsbl_sites =
  sbl-xbl.spamhaus.org*2
  cbl.abuseat.org*2
  bl.spamcop.net*2
  dnsbl.sorbs.net*1
  spam.spamrats.com*2
  dnsbl.ahbl.org*2
postscreen_dnsbl_threshold = 3
postscreen_dnsbl_action = enforce
postscreen_greet_action = enforce