---

- name: Default usage
  hosts: host1
  roles:
    - postfix

- name: Customize main configuration
  hosts: host2
  vars:
    # Override some of the default configuration
    postfix_config_inet_interfaces: all
    postfix_config_inet_protocols: all

    # Add some custom configuration
    postfix_config__custom:
      myhostname: mydomain.com
      mydomain: mydomain.com
      myorigin: $mydomain
      mynetworks: 192.168.0.0/16
  roles:
    - postfix

- name: Pattern tables customization
  hosts: host3
  vars:
    # Add two records into the access table
    postfix_tables_access:
      1.2.3: REJECT
      1.2.3.4: OK

    # Add one records into the generic table
    postfix_tables_generic:
      [email protected]: [email protected]

    # Adding completely new table
    postfix_tables__custom:
      # This is the table file name
      my_table:
        # This is the content of the table
        first_pattern: first_result
        second_pattern: second_result
  roles:
    - postfix

- name: Master table customization
  hosts: host4
  vars:
    # Change max number of processes for the anvil process
    postfix_master_anvil_maxproc: 2

    # Set max number of processes for the showq process
    postfix_master_showq__custom:
      maxproc: 1

    # Add new process into the master table
    postfix_master__custom:
      - myprocess:
          type: unix
          chroot: no
          command: myprocess -o myopt=
  roles:
    - postfix

# Package to be installed (explicit version can be specified here)
postfix_pkg: postfix

# Name of the Postfix service
postfix_service: postfix

# Command for postmap
postfix_postmap_cmd: postmap


# Location of the main Postfix config file
postfix_config_file: /etc/postfix/main.cf

# Paths
postfix_config_queue_directory: /var/spool/postfix
postfix_config_command_directory: /usr/sbin
postfix_config_daemon_directory: /usr/libexec/postfix
postfix_config_data_directory: /var/lib/postfix

# Mail owner
postfix_config_mail_owner: postfix

# Inet interface
postfix_config_inet_interfaces: localhost

# Inet protocols
postfix_config_inet_protocols: all

# Default mydestinations
postfix_config_mydestination__default:
  - $myhostname
  - localhost.$mydomain
  - localhost

# Custom mydestinations
postfix_config_mydestination__custom: []

# Final mydestinations
postfix_config_mydestination: "{{
  postfix_config_mydestination__default +
  postfix_config_mydestination__custom }}"

# Reject code
postfix_config_unknown_local_recipient_reject_code: 550

# Alias maps
postfix_config_alias_maps: hash:/etc/aliases

# Alias database
postfix_config_alias_database: hash:/etc/aliases

# Debug peer level
postfix_config_debug_peer_level: 2

# Default debugger command paths
postfix_config_debugger_command_path__default:
  - /bin
  - /usr/bin
  - /usr/local/bin
  - /usr/X11R6/bin

# Custom debugger command paths
postfix_config_debugger_command_path__custom: []

# Final debugger command paths
postfix_config_debugger_command_path: "{{
  postfix_config_debugger_command_path__default +
  postfix_config_debugger_command_path__custom }}"

# Debugger command
postfix_config_debugger_command: |2-
  
    PATH={{ postfix_config_debugger_command_path | join(':') }}
    ddd $daemon_directory/$process_name $process_id & sleep 5

# Bin paths
postfix_config_sendmail_path: /usr/sbin/sendmail.postfix
postfix_config_newaliases_path: /usr/bin/newaliases.postfix
postfix_config_mailq_path: /usr/bin/mailq.postfix

# Setgid group name
postfix_config_setgid_group: postdrop

# HTML directory (disabled by default)
postfix_config_html_directory: "no"

# Default Postfix configuration
postfix_config__default:
  queue_directory: "{{ postfix_config_queue_directory }}"
  command_directory: "{{ postfix_config_command_directory }}"
  daemon_directory: "{{ postfix_config_daemon_directory }}"
  data_directory: "{{ postfix_config_data_directory }}"
  mail_owner: "{{ postfix_config_mail_owner }}"
  inet_interfaces: "{{ postfix_config_inet_interfaces }}"
  inet_protocols: "{{ postfix_config_inet_protocols }}"
  mydestination: "{{ postfix_config_mydestination | join(', ') }}"
  unknown_local_recipient_reject_code: "{{ postfix_config_unknown_local_recipient_reject_code }}"
  alias_maps: "{{ postfix_config_alias_maps }}"
  alias_database: "{{ postfix_config_alias_database }}"
  debug_peer_level: "{{ postfix_config_debug_peer_level }}"
  debugger_command: "{{ postfix_config_debugger_command }}"
  sendmail_path: "{{ postfix_config_sendmail_path }}"
  newaliases_path: "{{ postfix_config_newaliases_path }}"
  mailq_path: "{{ postfix_config_mailq_path }}"
  setgid_group: "{{ postfix_config_setgid_group }}"
  html_directory: "{{ postfix_config_html_directory }}"

# Custom Postfix configuration
postfix_config__custom: {}

# Final Postfix config file
postfix_config: "{{
  postfix_config__default.update(postfix_config__custom) }}{{
  postfix_config__default }}"


# Access table
postfix_tables_access: {}

# Canonical table
postfix_tables_canonical: {}

# Generic table
postfix_tables_generic: {}

# Header checks table
postfix_tables_header_checks: {}

# Relocation table
postfix_tables_relocated: {}

# Transport table
postfix_tables_transport: {}

# Virtual table
postfix_tables_virtual: {}

# Default list of tables
postfix_tables__default:
  access: "{{ postfix_tables_access }}"
  canonical: "{{ postfix_tables_canonical }}"
  generic: "{{ postfix_tables_generic }}"
  header_checks: "{{ postfix_tables_header_checks }}"
  relocated: "{{ postfix_tables_relocated }}"
  transport: "{{ postfix_tables_transport }}"
  virtual: "{{ postfix_tables_virtual }}"

# Custom list of tables
postfix_tables__custom: {}

# Final list of tables
postfix_tables: "{{
  postfix_tables__default.update(postfix_tables__custom) }}{{
  postfix_tables__default }}"


# Location of the master.cf file
postfix_master_file: /etc/postfix/master.cf

# Default values of the anvil process configuration
postfix_master_anvil_type: unix
postfix_master_anvil_chroot: no
postfix_master_anvil_maxproc: 1
postfix_master_anvil_command: anvil

# Default anvil process configuration
postfix_master_anvil__default:
  type: "{{ postfix_master_anvil_type }}"
  chroot: "{{ postfix_master_anvil_chroot }}"
  maxproc: "{{ postfix_master_anvil_maxproc }}"
  command: "{{ postfix_master_anvil_command }}"

# Custom anvil process configuration
postfix_master_anvil__custom: {}

# Final anvil process configuration
postfix_master_anvil: "{{
  postfix_master_anvil__default.update(postfix_master_anvil__custom) }}{{
  postfix_master_anvil__default }}"

# Default values of the bounce process configuration
postfix_master_bounce_type: unix
postfix_master_bounce_chroot: no
postfix_master_bounce_maxproc: 0
postfix_master_bounce_command: bounce

# Default bounce process configuration
postfix_master_bounce__default:
  type: "{{ postfix_master_bounce_type }}"
  chroot: "{{ postfix_master_bounce_chroot }}"
  maxproc: "{{ postfix_master_bounce_maxproc }}"
  command: "{{ postfix_master_bounce_command }}"

# Custom bounce process configuration
postfix_master_bounce__custom: {}

# Final bounce process configuration
postfix_master_bounce: "{{
  postfix_master_bounce__default.update(postfix_master_bounce__custom) }}{{
  postfix_master_bounce__default }}"

# Default values of the cleanup process configuration
postfix_master_cleanup_type: unix
postfix_master_cleanup_private: no
postfix_master_cleanup_chroot: no
postfix_master_cleanup_maxproc: 0
postfix_master_cleanup_command: cleanup

# Default cleanup process configuration
postfix_master_cleanup__default:
  type: "{{ postfix_master_cleanup_type }}"
  private: "{{ postfix_master_cleanup_private }}"
  chroot: "{{ postfix_master_cleanup_chroot }}"
  maxproc: "{{ postfix_master_cleanup_maxproc }}"
  command: "{{ postfix_master_cleanup_command }}"

# Custom cleanup process configuration
postfix_master_cleanup__custom: {}

# Final cleanup process configuration
postfix_master_cleanup: "{{
  postfix_master_cleanup__default.update(postfix_master_cleanup__custom) }}{{
  postfix_master_cleanup__default }}"

# Default values of the defer process configuration
postfix_master_defer_type: unix
postfix_master_defer_chroot: no
postfix_master_defer_maxproc: 0
postfix_master_defer_command: bounce

# Default defer process configuration
postfix_master_defer__default:
  type: "{{ postfix_master_defer_type }}"
  chroot: "{{ postfix_master_defer_chroot }}"
  maxproc: "{{ postfix_master_defer_maxproc }}"
  command: "{{ postfix_master_defer_command }}"

# Custom defer process configuration
postfix_master_defer__custom: {}

# Final defer process configuration
postfix_master_defer: "{{
  postfix_master_defer__default.update(postfix_master_defer__custom) }}{{
  postfix_master_defer__default }}"

# Default values of the discard process configuration
postfix_master_discard_type: unix
postfix_master_discard_chroot: no
postfix_master_discard_command: discard

# Default discard process configuration
postfix_master_discard__default:
  type: "{{ postfix_master_discard_type }}"
  chroot: "{{ postfix_master_discard_chroot }}"
  command: "{{ postfix_master_discard_command }}"

# Custom discard process configuration
postfix_master_discard__custom: {}

# Final discard process configuration
postfix_master_discard: "{{
  postfix_master_discard__default.update(postfix_master_discard__custom) }}{{
  postfix_master_discard__default }}"

# Default values of the error process configuration
postfix_master_error_type: unix
postfix_master_error_chroot: no
postfix_master_error_command: error

# Default error process configuration
postfix_master_error__default:
  type: "{{ postfix_master_error_type }}"
  chroot: "{{ postfix_master_error_chroot }}"
  command: "{{ postfix_master_error_command }}"

# Custom error process configuration
postfix_master_error__custom: {}

# Final error process configuration
postfix_master_error: "{{
  postfix_master_error__default.update(postfix_master_error__custom) }}{{
  postfix_master_error__default }}"

# Default values of the flush process configuration
postfix_master_flush_type: unix
postfix_master_flush_private: no
postfix_master_flush_chroot: no
postfix_master_flush_wakeup: 1000?
postfix_master_flush_maxproc: 0
postfix_master_flush_command: flush

# Default flush process configuration
postfix_master_flush__default:
  type: "{{ postfix_master_flush_type }}"
  private: "{{ postfix_master_flush_private }}"
  chroot: "{{ postfix_master_flush_chroot }}"
  wakeup: "{{ postfix_master_flush_wakeup }}"
  maxproc: "{{ postfix_master_flush_maxproc }}"
  command: "{{ postfix_master_flush_command }}"

# Custom flush process configuration
postfix_master_flush__custom: {}

# Final flush process configuration
postfix_master_flush: "{{
  postfix_master_flush__default.update(postfix_master_flush__custom) }}{{
  postfix_master_flush__default }}"

# Default values of the lmtp process configuration
postfix_master_lmtp_type: unix
postfix_master_lmtp_chroot: no
postfix_master_lmtp_command: lmtp

# Default lmtp process configuration
postfix_master_lmtp__default:
  type: "{{ postfix_master_lmtp_type }}"
  chroot: "{{ postfix_master_lmtp_chroot }}"
  command: "{{ postfix_master_lmtp_command }}"

# Custom lmtp process configuration
postfix_master_lmtp__custom: {}

# Final lmtp process configuration
postfix_master_lmtp: "{{
  postfix_master_lmtp__default.update(postfix_master_lmtp__custom) }}{{
  postfix_master_lmtp__default }}"

# Default values of the local process configuration
postfix_master_local_type: unix
postfix_master_local_unpriv: no
postfix_master_local_chroot: no
postfix_master_local_command: local

# Default local process configuration
postfix_master_local__default:
  type: "{{ postfix_master_local_type }}"
  unpriv: "{{ postfix_master_local_unpriv }}"
  chroot: "{{ postfix_master_local_chroot }}"
  command: "{{ postfix_master_local_command }}"

# Custom local process configuration
postfix_master_local__custom: {}

# Final local process configuration
postfix_master_local: "{{
  postfix_master_local__default.update(postfix_master_local__custom) }}{{
  postfix_master_local__default }}"

# Default values of the pickup process configuration
postfix_master_pickup_type: fifo
postfix_master_pickup_private: no
postfix_master_pickup_chroot: no
postfix_master_pickup_wakeup: 60
postfix_master_pickup_maxproc: 1
postfix_master_pickup_command: pickup

# Default pickup process configuration
postfix_master_pickup__default:
  type: "{{ postfix_master_pickup_type }}"
  private: "{{ postfix_master_pickup_private }}"
  chroot: "{{ postfix_master_pickup_chroot }}"
  wakeup: "{{ postfix_master_pickup_wakeup }}"
  maxproc: "{{ postfix_master_pickup_maxproc }}"
  command: "{{ postfix_master_pickup_command }}"

# Custom pickup process configuration
postfix_master_pickup__custom: {}

# Final pickup process configuration
postfix_master_pickup: "{{
  postfix_master_pickup__default.update(postfix_master_pickup__custom) }}{{
  postfix_master_pickup__default }}"

# Default values of the proxymap process configuration
postfix_master_proxymap_type: unix
postfix_master_proxymap_chroot: no
postfix_master_proxymap_command: proxymap

# Default proxymap process configuration
postfix_master_proxymap__default:
  type: "{{ postfix_master_proxymap_type }}"
  chroot: "{{ postfix_master_proxymap_chroot }}"
  command: "{{ postfix_master_proxymap_command }}"

# Custom proxymap process configuration
postfix_master_proxymap__custom: {}

# Final proxymap process configuration
postfix_master_proxymap: "{{
  postfix_master_proxymap__default.update(postfix_master_proxymap__custom) }}{{
  postfix_master_proxymap__default }}"

# Default values of the proxywrite process configuration
postfix_master_proxywrite_type: unix
postfix_master_proxywrite_chroot: no
postfix_master_proxywrite_maxproc: 1
postfix_master_proxywrite_command: proxymap

# Default proxywrite process configuration
postfix_master_proxywrite__default:
  type: "{{ postfix_master_proxywrite_type }}"
  chroot: "{{ postfix_master_proxywrite_chroot }}"
  maxproc: "{{ postfix_master_proxywrite_maxproc }}"
  command: "{{ postfix_master_proxywrite_command }}"

# Custom proxywrite process configuration
postfix_master_proxywrite__custom: {}

# Final proxywrite process configuration
postfix_master_proxywrite: "{{
  postfix_master_proxywrite__default.update(postfix_master_proxywrite__custom) }}{{
  postfix_master_proxywrite__default }}"

# Default values of the qmgr process configuration
postfix_master_qmgr_type: fifo
postfix_master_qmgr_private: no
postfix_master_qmgr_chroot: no
postfix_master_qmgr_wakeup: 300
postfix_master_qmgr_maxproc: 1
postfix_master_qmgr_command: qmgr

# Default qmgr process configuration
postfix_master_qmgr__default:
  type: "{{ postfix_master_qmgr_type }}"
  private: "{{ postfix_master_qmgr_private }}"
  chroot: "{{ postfix_master_qmgr_chroot }}"
  wakeup: "{{ postfix_master_qmgr_wakeup }}"
  maxproc: "{{ postfix_master_qmgr_maxproc }}"
  command: "{{ postfix_master_qmgr_command }}"

# Custom qmgr process configuration
postfix_master_qmgr__custom: {}

# Final qmgr process configuration
postfix_master_qmgr: "{{
  postfix_master_qmgr__default.update(postfix_master_qmgr__custom) }}{{
  postfix_master_qmgr__default }}"

# Default values of the relay process configuration
postfix_master_relay_type: unix
postfix_master_relay_chroot: no
postfix_master_relay_command: smtp -o smtp_fallback_relay=

# Default relay process configuration
postfix_master_relay__default:
  type: "{{ postfix_master_relay_type }}"
  chroot: "{{ postfix_master_relay_chroot }}"
  command: "{{ postfix_master_relay_command }}"

# Custom relay process configuration
postfix_master_relay__custom: {}

# Final relay process configuration
postfix_master_relay: "{{
  postfix_master_relay__default.update(postfix_master_relay__custom) }}{{
  postfix_master_relay__default }}"

# Default values of the retry process configuration
postfix_master_retry_type: unix
postfix_master_retry_chroot: no
postfix_master_retry_command: error

# Default retry process configuration
postfix_master_retry__default:
  type: "{{ postfix_master_retry_type }}"
  chroot: "{{ postfix_master_retry_chroot }}"
  command: "{{ postfix_master_retry_command }}"

# Custom retry process configuration
postfix_master_retry__custom: {}

# Final retry process configuration
postfix_master_retry: "{{
  postfix_master_retry__default.update(postfix_master_retry__custom) }}{{
  postfix_master_retry__default }}"

# Default values of the rewrite process configuration
postfix_master_rewrite_type: unix
postfix_master_rewrite_chroot: no
postfix_master_rewrite_command: trivial-rewrite

# Default rewrite process configuration
postfix_master_rewrite__default:
  type: "{{ postfix_master_rewrite_type }}"
  chroot: "{{ postfix_master_rewrite_chroot }}"
  command: "{{ postfix_master_rewrite_command }}"

# Custom rewrite process configuration
postfix_master_rewrite__custom: {}

# Final rewrite process configuration
postfix_master_rewrite: "{{
  postfix_master_rewrite__default.update(postfix_master_rewrite__custom) }}{{
  postfix_master_rewrite__default }}"

# Default values of the scache process configuration
postfix_master_scache_type: unix
postfix_master_scache_chroot: no
postfix_master_scache_maxproc: 1
postfix_master_scache_command: scache

# Default scache process configuration
postfix_master_scache__default:
  type: "{{ postfix_master_scache_type }}"
  chroot: "{{ postfix_master_scache_chroot }}"
  maxproc: "{{ postfix_master_scache_maxproc }}"
  command: "{{ postfix_master_scache_command }}"

# Custom scache process configuration
postfix_master_scache__custom: {}

# Final scache process configuration
postfix_master_scache: "{{
  postfix_master_scache__default.update(postfix_master_scache__custom) }}{{
  postfix_master_scache__default }}"

# Default values of the showq process configuration
postfix_master_showq_type: unix
postfix_master_showq_private: no
postfix_master_showq_chroot: no
postfix_master_showq_command: showq

# Default showq process configuration
postfix_master_showq__default:
  type: "{{ postfix_master_showq_type }}"
  private: "{{ postfix_master_showq_private }}"
  chroot: "{{ postfix_master_showq_chroot }}"
  command: "{{ postfix_master_showq_command }}"

# Custom showq process configuration
postfix_master_showq__custom: {}

# Final showq process configuration
postfix_master_showq: "{{
  postfix_master_showq__default.update(postfix_master_showq__custom) }}{{
  postfix_master_showq__default }}"

# Default values of the smtp process configuration
postfix_master_smtp_type: inet
postfix_master_smtp_private: no
postfix_master_smtp_chroot: no
postfix_master_smtp_command: smtpd

# Default smtp process configuration
postfix_master_smtp__default:
  type: "{{ postfix_master_smtp_type }}"
  private: "{{ postfix_master_smtp_private }}"
  chroot: "{{ postfix_master_smtp_chroot }}"
  command: "{{ postfix_master_smtp_command }}"

# Custom smtp process configuration
postfix_master_smtp__custom: {}

# Final smtp process configuration
postfix_master_smtp: "{{
  postfix_master_smtp__default.update(postfix_master_smtp__custom) }}{{
  postfix_master_smtp__default }}"

# Default values of the smtp process configuration
postfix_master_smtpx_type: unix
postfix_master_smtpx_chroot: no
postfix_master_smtpx_command: smtp

# Default smtp process configuration
postfix_master_smtpx__default:
  type: "{{ postfix_master_smtpx_type }}"
  chroot: "{{ postfix_master_smtpx_chroot }}"
  command: "{{ postfix_master_smtpx_command }}"

# Custom smtp process configuration
postfix_master_smtpx__custom: {}

# Final smtp process configuration
postfix_master_smtpx: "{{
  postfix_master_smtpx__default.update(postfix_master_smtpx__custom) }}{{
  postfix_master_smtpx__default }}"

# Default values of the tlsmgr process configuration
postfix_master_tlsmgr_type: unix
postfix_master_tlsmgr_chroot: no
postfix_master_tlsmgr_wakeup: 1000?
postfix_master_tlsmgr_maxproc: 1
postfix_master_tlsmgr_command: tlsmgr

# Default tlsmgr process configuration
postfix_master_tlsmgr__default:
  type: "{{ postfix_master_tlsmgr_type }}"
  chroot: "{{ postfix_master_tlsmgr_chroot }}"
  wakeup: "{{ postfix_master_tlsmgr_wakeup }}"
  maxproc: "{{ postfix_master_tlsmgr_maxproc }}"
  command: "{{ postfix_master_tlsmgr_command }}"

# Custom tlsmgr process configuration
postfix_master_tlsmgr__custom: {}

# Final tlsmgr process configuration
postfix_master_tlsmgr: "{{
  postfix_master_tlsmgr__default.update(postfix_master_tlsmgr__custom) }}{{
  postfix_master_tlsmgr__default }}"

# Default values of the trace process configuration
postfix_master_trace_type: unix
postfix_master_trace_chroot: no
postfix_master_trace_maxproc: 0
postfix_master_trace_command: bounce

# Default trace process configuration
postfix_master_trace__default:
  type: "{{ postfix_master_trace_type }}"
  chroot: "{{ postfix_master_trace_chroot }}"
  maxproc: "{{ postfix_master_trace_maxproc }}"
  command: "{{ postfix_master_trace_command }}"

# Custom trace process configuration
postfix_master_trace__custom: {}

# Final trace process configuration
postfix_master_trace: "{{
  postfix_master_trace__default.update(postfix_master_trace__custom) }}{{
  postfix_master_trace__default }}"

# Default values of the verify process configuration
postfix_master_verify_type: unix
postfix_master_verify_chroot: no
postfix_master_verify_maxproc: 1
postfix_master_verify_command: verify

# Default verify process configuration
postfix_master_verify__default:
  type: "{{ postfix_master_verify_type }}"
  chroot: "{{ postfix_master_verify_chroot }}"
  maxproc: "{{ postfix_master_verify_maxproc }}"
  command: "{{ postfix_master_verify_command }}"

# Custom verify process configuration
postfix_master_verify__custom: {}

# Final verify process configuration
postfix_master_verify: "{{
  postfix_master_verify__default.update(postfix_master_verify__custom) }}{{
  postfix_master_verify__default }}"

# Default values of the virtual process configuration
postfix_master_virtual_type: unix
postfix_master_virtual_unpriv: no
postfix_master_virtual_chroot: no
postfix_master_virtual_command: virtual

# Default virtual process configuration
postfix_master_virtual__default:
  type: "{{ postfix_master_virtual_type }}"
  unpriv: "{{ postfix_master_virtual_unpriv }}"
  chroot: "{{ postfix_master_virtual_chroot }}"
  command: "{{ postfix_master_virtual_command }}"

# Custom virtual process configuration
postfix_master_virtual__custom: {}

# Final virtual process configuration
postfix_master_virtual: "{{
  postfix_master_virtual__default.update(postfix_master_virtual__custom) }}{{
  postfix_master_virtual__default }}"

# Default master configuration
postfix_master__default:
  - anvil: "{{ postfix_master_anvil }}"
  - bounce: "{{ postfix_master_bounce }}"
  - cleanup: "{{ postfix_master_cleanup }}"
  - defer: "{{ postfix_master_defer }}"
  - discard: "{{ postfix_master_discard }}"
  - error: "{{ postfix_master_error }}"
  - flush: "{{ postfix_master_flush }}"
  - lmtp: "{{ postfix_master_lmtp }}"
  - local: "{{ postfix_master_local }}"
  - pickup: "{{ postfix_master_pickup }}"
  - proxymap: "{{ postfix_master_proxymap }}"
  - proxywrite: "{{ postfix_master_proxywrite }}"
  - qmgr: "{{ postfix_master_qmgr }}"
  - relay: "{{ postfix_master_relay }}"
  - retry: "{{ postfix_master_retry }}"
  - rewrite: "{{ postfix_master_rewrite }}"
  - scache: "{{ postfix_master_scache }}"
  - showq: "{{ postfix_master_showq }}"
  - smtp: "{{ postfix_master_smtp }}"
  - smtp: "{{ postfix_master_smtpx }}"
  - tlsmgr: "{{ postfix_master_tlsmgr }}"
  - trace: "{{ postfix_master_trace }}"
  - verify: "{{ postfix_master_verify }}"
  - virtual: "{{ postfix_master_virtual }}"

# Custom master configuration
postfix_master__custom: []

# Final master configuration
postfix_master: "{{
  postfix_master__default +
  postfix_master__custom }}"