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# See /usr/share/postfix/main.cf.dist for a commented, more complete version
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# Under Debian, when a file name is specified, the first line of the
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# file be used as the SMTP server's name.
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myorigin = /etc/mailname
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# Debian specific: Specifying a file name will cause the first
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# line of that file to be used as the name. The Debian default
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# is /etc/mailname.
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#myorigin = /etc/mailname
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# Text shown to connecting clients as part of SMTP greeting.
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smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
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# Disable the use of local biff service for new mail notifications to
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# local users.
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biff = no
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# appending .domain is the MUA's job.
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# Do not append server's domain to locally sent mail. This is up to
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# sending MUAs to take care of.
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append_dot_mydomain = no
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# Uncomment the next line to generate "delayed mail" warnings
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#delay_warning_time = 4h
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# Disable output of Postfix README file paths when invoking postconf.
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readme_directory = no
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# TLS parameters
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# Enable opportunistic TLS. Announce to connecting clients it is
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# enabled, but do not enforce it.
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smtpd_use_tls=yes
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# Use locally-issued self-signed certificates for TLS.
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smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
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smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
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# Use custom, generated DH parameters for increased security.
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smtpd_tls_dh1024_param_file = /etc/ssl/private/{{ inventory_hostname }}_smtp.dh.pem
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smtpd_tls_dh512_param_file = /etc/ssl/private/{{ inventory_hostname }}_smtp.dh.pem
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smtpd_use_tls=yes
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# Enable TLS session cache database for SMTP client. Helps with
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# performance and bandwidth usage.
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smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
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{% if smtp_relay_host %}
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# Force full TLS certificate validation for SMTP client when it
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# connect to relay host.
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smtp_tls_security_level=verify
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smtp_tls_CAfile=/etc/ssl/certs/smtp_relay_truststore.pem
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{% endif %}
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# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
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# information on enabling SSL in the smtp client.
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# Static relay host to use for outgoing mails from this server.
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relayhost = {{ smtp_relay_host }}{% if smtp_relay_host and smtp_relay_host_port %}:{{ smtp_relay_host_port }}{% endif %}
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# Internet hostname of this mail system.
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myhostname = {{ inventory_hostname }}
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# Alias maps for local deliveries (to system accounts).
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alias_maps = hash:/etc/aliases
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# Alias database that gets updated when invoking "newaliases" command.
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alias_database = hash:/etc/aliases
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myorigin = /etc/mailname
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# List of domains for local transport deliveries.
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mydestination = {{ inventory_hostname }}, {{ inventory_hostname_short }}, localhost.localdomain, localhost
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relayhost = {{ smtp_relay_host }}{% if smtp_relay_host and smtp_relay_host_port %}:{{ smtp_relay_host_port }}{% endif %}{{ '' }}
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# List of trusted networks allowed to relay mail through this system.x
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mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
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# External command for local mail deliveries.
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mailbox_command = procmail -a "$EXTENSION"
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# Disable size limits for local user mailboxes.
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mailbox_size_limit = 0
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# Recipient delimeter for separating user name from its extension.
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recipient_delimiter = +
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# Listen on all network interfaces and all protocols.
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inet_interfaces = all
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inet_protocols = all
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# Fall-back to using native lookups (/etc/hosts etc) if DNS lookup fails. Useful
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# for local overrides of mail servers.
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# Fall-back to using native lookups (/etc/hosts etc) if DNS lookup
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# fails. Useful for local overrides of mail servers.
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smtp_host_lookup = dns, native
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# Explicitly set maximum allowed mail size that should be accepted.
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