########################################################################
# MX configuration
#
# {{ ansible_managed }}
# Do NOT edit this file directly!

smtpd_banner     = $myhostname ESMTP $mail_name (Debian/GNU)
biff             = no
readme_directory = no
mail_owner       = postfix

delay_warning_time     = 4h
maximal_queue_lifetime = 5d

myorigin            = /etc/mailname
myhostname          = mx{{ mxno | default('') }}.$mydomain
mydomain            = {{ ansible_domain }}
append_dot_mydomain = no

# Turn off all TCP/IP listener ports except that necessary for the mail
# exchange.
master_service_disable = !smtp.inet inet

queue_directory       = /var/spool/postfix-{{ postfix_instance[inst].name }}
data_directory        = /var/lib/postfix-{{ postfix_instance[inst].name }}
multi_instance_group  = {{ postfix_instance[inst].group | default('') }}
multi_instance_name   = postfix-{{ postfix_instance[inst].name }}
multi_instance_enable = yes

# This server is a Mail eXchange
mynetworks_style = host
inet_interfaces  = all
inet_protocols   = all

# No local delivery
mydestination        =
local_transport      = error:5.1.1 Mailbox unavailable
alias_maps           =
alias_database       =
local_recipient_maps =

message_size_limit  = 67108864
recipient_delimiter = +

# Forward everything to our internal mailhub
{% if 'MTA-out' in group_names %}
relayhost     = [127.0.0.1]:{{ MTA_out.port }}
{% else %}
relayhost     = [{{ MTA_out.host }}]:{{ MTA_out.port }}
{% endif %}
relay_domains =

# Virtual transport
{% if 'LDA' in group_names %}
virtual_transport = smtpl:[127.0.0.1]:{{ LDA.port }}
{% else %}
virtual_transport = smtps:[{{ LDA.host }}]:{{ LDA.port }}
{% endif %}

virtual_mailbox_domains = ldap:$config_directory/virtual/mailbox_domains.cf
virtual_alias_maps      = pcre:$config_directory/virtual/reserved_alias.pcre
                          ldap:$config_directory/virtual/alias.cf
                          # stop the alias resolution (by making finding
                          # an A -> A alias) before searching for
                          # catch-alls and domain aliases
                          $virtual_mailbox_maps
                          ldap:$config_directory/virtual/alias_domains.cf
                          ldap:$config_directory/virtual/catchall.cf
virtual_mailbox_maps    = ldap:$config_directory/virtual/mailbox.cf
                          ldap:$config_directory/virtual/list.cf
transport_maps          = cdb:$config_directory/virtual/transport_reserved_alias
                          ldap:$config_directory/virtual/transport_list.cf

# Don't rewrite remote headers
local_header_rewrite_clients     =
# Pass the client information along to the content filter
smtp_send_xforward_command       = yes
# Avoid splitting the envelope and scanning messages multiple times
smtp_destination_recipient_limit = 1000
# Tolerate occasional high latency
smtp_data_done_timeout           = 1200s

# Tunnel everything through IPSec
smtp_tls_security_level = none
{% if 'MTA-out' in group_names %}
smtp_bind_address       = 127.0.0.1
{% else %}
smtp_bind_address       = 172.16.0.1
{% endif %}

# TLS
smtpd_tls_security_level        = may
smtpd_tls_cert_file             = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file              = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_CApath                = /etc/ssl/certs/
smtpd_tls_session_cache_database= btree:$data_directory/smtpd_tls_session_cache
smtpd_tls_received_header       = yes
smtpd_tls_ask_ccert             = yes
smtpd_tls_fingerprint_digest    = sha1
smtpd_tls_eecdh_grade           = strong
tls_random_source               = dev:/dev/urandom


# http://en.linuxreviews.org/HOWTO_Stop_spam_using_Postfix
# http://www.howtoforge.com/block_spam_at_mta_level_postfix

strict_rfc821_envelopes = yes
smtpd_delay_reject      = yes
disable_vrfy_command    = yes

# UCE control
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


smtpd_client_restrictions =
    permit_mynetworks
    reject_rbl_client zen.spamhaus.org
    reject_rbl_client bl.spamcop.net

smtpd_helo_required     = yes
smtpd_helo_restrictions =
    permit_mynetworks
    reject_non_fqdn_helo_hostname
    reject_invalid_helo_hostname

smtpd_sender_restrictions =
    reject_non_fqdn_sender
    reject_unknown_sender_domain

smtpd_recipient_restrictions =
    # RFC requirements
    reject_non_fqdn_recipient
    reject_unknown_recipient_domain
    permit_mynetworks
    reject_unauth_destination
    check_policy_service unix:private/postgrey

smtpd_data_restrictions =
    reject_unauth_pipelining