roles/postfix/templates/main.cf

   1 # local delivery: aliases only
   2 alias_maps = hash:/etc/aliases
   3 local_recipient_maps = $alias_maps
   4 # only consider ourselves local
   5 mynetworks_style = host
   6 {% if postfix.mynetworks is defined %}
   7 mynetworks = {{ postfix.mynetworks }}
   8 {% endif %}
   9
  10 # TLS server parameters
  11 smtpd_tls_cert_file=/etc/ssl/mycerts/letsencrypt/live.crt+chain
  12 smtpd_tls_key_file=/etc/ssl/private/letsencrypt/live.key
  13 smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
  14 smtpd_tls_security_level = may
  15 smtpd_tls_loglevel = 1
  16 smtpd_tls_dh1024_param_file = /etc/ssl/dh2048.pem
  17 smtpd_tls_mandatory_protocols = !SSLv2 !SSLv3
  18 smtpd_tls_ciphers = low
  19 smtpd_tls_mandatory_ciphers = high
  20 # TLS client parameters
  21 smtp_tls_mandatory_protocols = !SSLv2 !SSLv3
  22 smtp_tls_ciphers = low
  23 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
  24 smtp_tls_loglevel = 1
  25 {% if not(postfix.relay_host is defined) %}
  26 smtp_tls_security_level = dane
  27 smtp_dns_support_level = dnssec
  28 {% endif %}
  29
  30 {% if postfix.relay_host is defined %}
  31 # Relay everything
  32 default_transport = smtp:{{ postfix.relay_host }}
  33 {% if postfix.relay_client_cert is defined %}
  34 # Enforce relay encryption
  35 smtp_tls_cert_file=$config_directory/{{ postfix.relay_client_cert }}.crt
  36 smtp_tls_key_file=$config_directory/{{ postfix.relay_client_cert }}.key
  37 smtp_tls_security_level = encrypt
  38 {% endif %}
  39 {% endif %}
  40
  41 {% if postfix.postscreen is defined and postfix.postscreen %}
  42 # postscreen config
  43 postscreen_dnsbl_threshold = 3
  44 postscreen_dnsbl_whitelist_threshold = -2
  45 postscreen_dnsbl_sites =
  46         ix.dnsbl.manitu.net*2 sbl-xbl.spamhaus.org*2
  47         bl.spamcop.net dnsbl.sorbs.net bl.mailspike.net
  48         swl.spamhaus.org*-2 list.dnswl.org=127.0.[0..255].[0..254]*-2
  49 postscreen_greet_action = enforce
  50 postscreen_dnsbl_action = enforce
  51 postscreen_pipelining_enable = yes
  52 postscreen_non_smtp_command_enable = yes
  53 postscreen_bare_newline_enable = yes
  54 {% endif %}
  55
  56 # control relay access
  57 smtpd_relay_restrictions = permit_mynetworks, permit_tls_clientcerts,
  58     # allow nobody else
  59     defer_unauth_destination
  60 # spam-protection restrictions
  61 smtpd_helo_required = yes
  62 smtpd_recipient_restrictions = permit_mynetworks, permit_tls_clientcerts,
  63     # check everybody else
  64     reject_unauth_pipelining,
  65     reject_invalid_helo_hostname,
  66     reject_non_fqdn_recipient,
  67     reject_non_fqdn_sender,
  68
  69 # misc
  70 smtpd_delay_reject = yes
  71 disable_vrfy_command = yes
  72 recipient_delimiter = +
  73 delay_warning_time = 4h
  74 message_size_limit = 21384000
  75 append_dot_mydomain = no