compatibility_level = 2

{% if postfix.hostname is defined %}
myhostname = {{ postfix.hostname }}
{% endif %}
{% if postfix.mynetworks is defined %}
mynetworks = {{ postfix.mynetworks }}
{% endif %}

# local delivery: aliases only
alias_maps = hash:/etc/aliases
local_recipient_maps = $alias_maps

{% if 'letsencrypt' in group_names %}
# TLS server parameters
smtpd_tls_cert_file=/etc/ssl/mycerts/letsencrypt/live.crt
smtpd_tls_key_file=/etc/ssl/private/letsencrypt/live.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_tls_security_level = may
smtpd_tls_loglevel = 1
smtpd_tls_dh1024_param_file = /etc/ssl/dh2048.pem
smtpd_tls_mandatory_protocols = !SSLv2 !SSLv3
smtpd_tls_ciphers = low
smtpd_tls_mandatory_ciphers = high
{% endif %}
# TLS client parameters
smtp_tls_mandatory_protocols = !SSLv2 !SSLv3
smtp_tls_ciphers = low
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtp_tls_loglevel = 1
{% if 'unbound' in group_names %}
# If there are TLSA records, enforce using encryption
smtp_dns_support_level = dnssec
smtp_tls_security_level = dane
{% endif %}

{% if postfix.postscreen | default(False) %}
# postscreen config
postscreen_dnsbl_threshold = 3
postscreen_dnsbl_whitelist_threshold = -2
postscreen_dnsbl_sites =
	ix.dnsbl.manitu.net*2 sbl-xbl.spamhaus.org*3 truncate.gbudb.net*2
	bl.spamcop.net bl.mailspike.net
	swl.spamhaus.org*-2 list.dnswl.org=127.0.[0..255].[0..254]*-2
postscreen_greet_action = enforce
postscreen_dnsbl_action = enforce
postscreen_pipelining_enable = yes
postscreen_non_smtp_command_enable = yes
postscreen_bare_newline_enable = yes
postscreen_access_list = permit_mynetworks,
	cidr:$config_directory/postscreen_access.cidr
postscreen_blacklist_action = enforce
{% endif %}

# control relay access
smtpd_relay_restrictions = permit_mynetworks, permit_tls_clientcerts,
    # allow nobody else
    defer_unauth_destination
# spam-protection restrictions
smtpd_helo_required = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_tls_clientcerts,
    # check everybody else
    reject_unauth_pipelining,
    reject_invalid_helo_hostname,
    reject_non_fqdn_recipient,
    reject_non_fqdn_sender,

# SMTP smuggling protection
# <https://www.postfix.org/smtp-smuggling.html>
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_discard_ehlo_keywords = chunking

{% if postfix.relay_host is defined %}
# Relay everything
default_transport = smtp:{{ postfix.relay_host }}
{% if postfix.relay_client_cert is defined %}
# Enforce relay encryption
smtp_tls_cert_file=$config_directory/{{ postfix.relay_client_cert }}.crt
smtp_tls_key_file=$config_directory/{{ postfix.relay_client_cert }}.key
smtp_tls_security_level = encrypt
{% endif %}
{% endif %}

{% if postfix.submission | default(False) %}
# configure SASL
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
{% endif %}

{% if postfix.relay_client_cert_whitelist is defined %}
# allow relay for some TLS-authenticated clients
smtpd_tls_ask_ccert = yes
smtpd_tls_fingerprint_digest = sha1
relay_clientcerts = hash:$config_directory/relay_clientcerts
{% endif %}

# setup virtual delivery domains, aliases and destinations
virtual_mailbox_domains = {{ postfix.alias_domains | default("") }}
{% if postfix.mailman is defined %}  {% for item in postfix.mailman.domains %} {{item}}{% endfor %}{% endif %}
{% if postfix.dovecot is defined %}  {% for item in postfix.dovecot.domains %} {{item}}{% endfor %}{% endif %}

virtual_alias_maps = hash:$config_directory/virtual_alias_map
  {% if postfix.dovecot is defined %}
  proxy:mysql:$config_directory/mysql_vmail_aliases.cf
  {% endif %}

virtual_mailbox_maps =
  {% if postfix.dovecot is defined %}
  proxy:mysql:$config_directory/mysql_vmail_users.cf
  {% endif %}
  {% if postfix.mailman | default(False) %}
  hash:/var/lib/mailman/data/virtual-mailman
  {% endif %}

smtpd_sender_login_maps =
  {% if postfix.dovecot is defined %}
  proxy:mysql:$config_directory/mysql_vmail_users.cf
  proxy:mysql:$config_directory/mysql_vmail_senders.cf
  proxy:mysql:$config_directory/mysql_vmail_aliases.cf
  {% endif %}

proxy_read_maps = $virtual_alias_maps $virtual_mailbox_maps $smtpd_sender_login_maps

# setup mail routes for virtual mail: all mail ends up being forwarded somewhere
virtual_transport = error
transport_maps = hash:$config_directory/transport_map
{% if postfix.mailman | default(False) %}
mailman_destination_recipient_limit = 1
{% endif %}

{% if postfix.smtp_outgoing is defined %}
# send mail via specific IP
default_transport = {{ postfix.default_smtp_outgoing }}
sender_dependent_default_transport_maps = hash:$config_directory/sender_transport_map
{% endif %}

{% if postfix.opendkim is defined %}
# DKIM & Milter
milter_default_action = accept
# Path must match opendkim.env
smtpd_milters = unix:opendkim/sock
non_smtpd_milters = $smtpd_milters
{% endif %}

# misc
smtpd_delay_reject = yes
disable_vrfy_command = yes
recipient_delimiter = {{ postfix.recipient_delimiter | default("+") }}
delay_warning_time = 4h
message_size_limit = 30100100