2020-07-24 12:42:59 +02:00
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##
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## Network settings
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##
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mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
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inet_interfaces = all
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smtp_address_preference = ipv6
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myhostname = {{ mailserver_mx_domain }}
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##
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## Mail queue settings
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##
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maximal_queue_lifetime = 1h
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bounce_queue_lifetime = 1h
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maximal_backoff_time = 15m
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minimal_backoff_time = 5m
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queue_run_delay = 5m
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##
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## TLS settings
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###
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2021-01-14 23:35:02 +01:00
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tls_preempt_cipherlist = no
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2020-07-24 12:42:59 +02:00
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tls_ssl_options = NO_COMPRESSION
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2021-01-14 23:35:02 +01:00
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tls_medium_cipherlist = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
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2020-07-24 12:42:59 +02:00
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### Outbound SMTP connections (Postfix as sender)
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{% if mailserver_dovecot_enabled %}
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smtp_tls_security_level = may
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{% else %}
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smtp_tls_security_level = dane
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smtp_dns_support_level = dnssec
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smtp_tls_policy_maps = proxy:{{ mailserver_db_type }}:/etc/postfix/sql/tls-policy.cf
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{% endif %}
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smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
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smtp_tls_protocols = !SSLv2, !SSLv3
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smtp_tls_ciphers = high
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smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
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### Inbound SMTP connections
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smtpd_tls_security_level = may
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2021-01-14 23:35:02 +01:00
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smtpd_tls_auth_only = yes
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smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
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smtpd_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
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smtpd_tls_mandatory_ciphers = medium
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2020-07-24 12:42:59 +02:00
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smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
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smtpd_tls_key_file = /etc/dehydrated/certs/{{ mailserver_cert_domains.split(' ')[0] }}/privkey.pem
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smtpd_tls_cert_file = /etc/dehydrated/certs/{{ mailserver_cert_domains.split(' ')[0] }}/fullchain.pem
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smtpd_tls_dh1024_param_file = ${config_directory}/dh.pem
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##
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## Local mail delivery to Dovecot via LMTP
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##
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virtual_transport = lmtp:unix:private/dovecot-lmtp
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{% if mailserver_rspamd_enabled %}
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##
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## Spam filter and DKIM signatures via Rspamd
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##
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smtpd_milters = inet:127.0.0.1:11332
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non_smtpd_milters = inet:127.0.0.1:11332
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milter_protocol = 6
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milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}
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milter_default_action = accept
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{% endif %}
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##
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## Server Restrictions for clients, cecipients and relaying
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## (concerning S2S-connections. Mailclient-connections are configured in submission-section in master.cf)
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##
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### Conditions in which Postfix works as a relay. (for mail user clients)
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smtpd_relay_restrictions = reject_non_fqdn_recipient
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# reject_unknown_recipient_domain
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permit_mynetworks
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reject_unauth_destination
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### Conditions in which Postfix accepts e-mails as recipient (additional to relay conditions)
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### check_recipient_access checks if an account is "sendonly"
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#smtpd_recipient_restrictions = check_recipient_access proxy:{{ mailserver_db_type }}:/etc/postfix/sql/recipient-access.cf
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### Restrictions for all sending foreign servers ("SMTP clients")
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smtpd_client_restrictions = permit_mynetworks
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2020-07-24 17:07:52 +02:00
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# check_client_access hash:/etc/postfix/without_ptr
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2020-07-24 12:42:59 +02:00
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# reject_unknown_client_hostname
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### Foreign mail servers must present a valid "HELO"
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# Recipient address rejected: Domain not found;
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smtpd_helo_required = yes
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smtpd_helo_restrictions = permit_mynetworks
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reject_invalid_helo_hostname
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reject_non_fqdn_helo_hostname
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# reject_unknown_helo_hostname
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# Block clients, which start sending too early
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smtpd_data_restrictions = reject_unauth_pipelining
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##
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## Restrictions for MUAs (Mail user agents)
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##
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mua_relay_restrictions = reject_non_fqdn_recipient,reject_unknown_recipient_domain,permit_mynetworks,permit_sasl_authenticated,reject
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mua_sender_restrictions = permit_mynetworks,reject_non_fqdn_sender,reject_sender_login_mismatch,permit_sasl_authenticated,reject
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mua_client_restrictions = permit_mynetworks,permit_sasl_authenticated,reject
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##
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## Postscreen Filter
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##
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### Postscreen Whitelist / Blocklist
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postscreen_access_list = permit_mynetworks
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2020-07-24 17:07:52 +02:00
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# cidr:/etc/postfix/postscreen_access
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2020-07-24 12:42:59 +02:00
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postscreen_blacklist_action = drop
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# Drop connections if other server is sending too quickly
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postscreen_greet_action = drop
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### DNS blocklists
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postscreen_dnsbl_threshold = 2
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postscreen_dnsbl_sites = ix.dnsbl.manitu.net*2
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zen.spamhaus.org*2
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postscreen_dnsbl_action = drop
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##
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## MySQL queries
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##
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alias_maps =
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hash:/etc/postfix/aliases
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{% if mailserver_mailman_enabled %}
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hash:/var/lib/mailman/data/aliases
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{% endif %}
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alias_database = $alias_maps
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virtual_alias_maps =
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{% if mailserver_dovecot_enabled %}
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proxy:{{ mailserver_db_type }}:/etc/postfix/sql/virtual-alias-maps.cf
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proxy:{{ mailserver_db_type }}:/etc/postfix/sql/virtual-alias-domains-maps.cf
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{% endif %}
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{% if mailserver_mailman_enabled %}
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hash:/var/lib/mailman/data/virtual-mailman
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{% endif %}
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{% if mailserver_dovecot_enabled %}
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virtual_alias_domains = proxy:{{ mailserver_db_type }}:/etc/postfix/sql/virtual-alias-domains.cf
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virtual_mailbox_maps = proxy:{{ mailserver_db_type }}:/etc/postfix/sql/virtual-mailbox-maps.cf
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virtual_mailbox_domains = proxy:{{ mailserver_db_type }}:/etc/postfix/sql/virtual-mailbox-domains.cf
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# List of authorized senders
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smtpd_sender_login_maps =
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proxy:{{ mailserver_db_type }}:/etc/postfix/sql/smtpd-sender-login-maps.cf
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proxy:{{ mailserver_db_type }}:/etc/postfix/sql/virtual-sender-maps.cf
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{% endif %}
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local_recipient_maps = $smtpd_sender_login_maps
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{% if mailserver_mailman_enabled %}
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relay_domains =
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hash:/var/lib/mailman/data/relay-domains
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{% endif %}
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##
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## Miscellaneous
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##
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### Maximum mailbox size (0=unlimited - is already limited by Dovecot quota)
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mailbox_size_limit = 0
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### Maximum size of inbound e-mails (50 MB)
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message_size_limit = 52428800
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### Do not notify system users on new e-mail
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biff = no
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### Users always have to provide full e-mail addresses
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append_dot_mydomain = no
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### Delimiter for "Address Tagging"
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recipient_delimiter = +
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#------------------------------
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compatibility_level = 2
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