462 lines
12 KiB
Plaintext
462 lines
12 KiB
Plaintext
## ------------------------------------ ## ## - - ##
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## - install postfix base system - ##
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## - - ##
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## - supports ipv6 - ##
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## - - ##
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## ------------------------------------ ##
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_TLS_CERT_DIR=/etc/postfix/ssl
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_TLS_CERT_FILE="${_TLS_CERT_DIR}/mailserver.crt"
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_TLS_KEY_FILE="${_TLS_CERT_DIR}/mailserver.key"
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_TLS_CA_FILE=/etc/ssl/certs/ca-certificates.crt
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_HOSTNAME=<hostname>
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_IPV4=<ipv4-address>
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## - Leave empty, if no IPv6 should be supported
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## -
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#_IPV6=<ipv6-address>
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_IPV6=
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_ADMIN_EMAIL=<admin_email>
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_SASL_AUTH=<true|false>
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_RELAY_HOST=b.mx.oopen.de
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_SASL_USER=<sasl_user>
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_SASL_PASS='sasl_password'
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## - remove exim4 and related if installed and you plan
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## - to install an alternative mailer
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## -
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apt-get remove --purge bsd-mailx exim4 exim4-base exim4-config \
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exim4-daemon-light mailx
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apt-get install postfix postfix-pcre libsasl2-modules bsd-mailx haveged
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if $_SASL_AUTH ; then
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apt-get install libsasl2-modules
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fi
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cp -a /etc/postfix/main.cf /etc/postfix/main.cf.ORIG
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cat <<EOF > /etc/postfix/main.cf
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# ============ Basic settings ============
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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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myorigin = /etc/mailname
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smtpd_banner = \$myhostname ESMTP \$mail_name (Debian/GNU)
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biff = no
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# appending .domain is the MUA's job.
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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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readme_directory = /usr/share/doc/postfix
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html_directory = /usr/share/doc/postfix/html
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## - The Internet protocols Postfix will attempt to use when making
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## - or accepting connections.
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## - DEFAULT: ipv4
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EOF
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if [ -n "$_IPV6" ]; then
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cat <<EOF >> /etc/postfix/main.cf
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inet_protocols = ipv4, ipv6
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#inet_interfaces = all
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inet_interfaces = 127.0.0.1
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$_IPV4
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$_IPV6
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myhostname = $_HOSTNAME
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mydestination =
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$_HOSTNAME
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localhost
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## - The list of "trusted" SMTP clients that have more
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## - privileges than "strangers"
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## -
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mynetworks =
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127.0.0.0/8
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[::ffff:127.0.0.0]/104
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[::1]/128
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${_IPV4}/32
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[${_IPV6}]/128
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smtp_bind_address = $_IPV4
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smtp_bind_address6 = $_IPV6
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EOF
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else
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cat <<EOF >> /etc/postfix/main.cf
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inet_protocols = ipv4
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#inet_interfaces = all
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inet_interfaces =
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127.0.0.1
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$_IPV4
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myhostname = $_HOSTNAME
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mydestination =
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$_HOSTNAME
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localhost
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## - The list of "trusted" SMTP clients that have more
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## - privileges than "strangers"
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## -
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mynetworks =
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127.0.0.0/8
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${_IPV4}/32
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smtp_bind_address = $_IPV4
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#smtp_bind_address6 = $_IPV6
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EOF
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fi
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cat <<EOF >> /etc/postfix/main.cf
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## - The method to generate the default value for the mynetworks parameter.
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## -
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## - mynetworks_style = host" when Postfix should "trust" only the local machine
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## - mynetworks_style = subnet (default value) "when Postfix should "trust" SMTP
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## - clients in the same IP subnetworks as the local machine.
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## - mynetworks_style = class" when Postfix should "trust" SMTP clients in the same
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## - IP class A/B/C networks as the local machine.
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## -
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#mynetworks_style = host
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## - The maximal size of any local(8) individual mailbox or maildir file,
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## - or zero (no limit). In fact, this limits the size of any file that is
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## - written to upon local delivery, including files written by external
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## - commands that are executed by the local(8) delivery agent.
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## -
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mailbox_size_limit = 0
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## - The maximal size in bytes of a message, including envelope information.
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## -
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## - we user 50MB
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## -
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message_size_limit = 52480000
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## - The system-wide recipient address extension delimiter
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## -
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recipient_delimiter = +
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## - The alias databases that are used for local(8) delivery.
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## -
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alias_maps =
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hash:/etc/aliases
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## - The alias databases for local(8) delivery that are updated
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## - with "newaliases" or with "sendmail -bi".
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## -
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alias_database =
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hash:/etc/aliases
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## - The maximal time a message is queued before it is sent back as
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## - undeliverable. Defaults to 5d (5 days)
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## - Specify 0 when mail delivery should be tried only once.
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## -
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maximal_queue_lifetime = 3d
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bounce_queue_lifetime = \$maximal_queue_lifetime
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## - delay_warning_time (default: 0h)
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## -
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## - The time after which the sender receives a copy of the message
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## - headers of mail that is still queued. To enable this feature,
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## - specify a non-zero time value (an integral value plus an optional
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## - one-letter suffix that specifies the time unit).
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## - Time units: s (seconds), m (minutes), h (hours), d (days), w (weeks).
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## - The default time unit is h (hours).
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delay_warning_time = 1d
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EOF
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if $_SASL_AUTH ; then
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cat <<EOF >> /etc/postfix/main.cf
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# ============ Relay parameters ============
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#relayhost =
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# ============ SASL authentication ============
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# Enable SASL authentication
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smtp_sasl_auth_enable = yes
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# Forwarding to the ip-adress of host b.mx.oopen.de
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relayhost = [b.mx.oopen.de]
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# File including login data
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smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
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# Force using a (TLS) security connection
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# obsulete - use smtp_tls_security_level instead
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#smtp_use_tls = yes
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#smtp_tls_enforce_peername = no
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smtp_tls_security_level = encrypt
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# Disallow methods that allow anonymous authentication.
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smtp_sasl_security_options = noanonymous
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# ============ TLS parameters ============
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## - Aktiviert TLS für den Mailempfang
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## -
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## - may:
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## - Opportunistic TLS. Use TLS if this is supported by the remote
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## - SMTP server, otherwise use plaintext
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## -
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## - This overrides the obsolete parameters smtpd_use_tls and
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## - smtpd_enforce_tls. This parameter is ignored with
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## - "smtpd_tls_wrappermode = yes".
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#smtpd_use_tls=yes
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smtp_tls_security_level=encrypt
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EOF
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else
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cat <<EOF >> /etc/postfix/main.cf
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# ============ Relay parameters ============
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relayhost =
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# ============ TLS parameters ============
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## - Aktiviert TLS für den Mailempfang
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## -
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## - may:
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## - Opportunistic TLS. Use TLS if this is supported by the remote
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## - SMTP server, otherwise use plaintext
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## -
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## - This overrides the obsolete parameters smtpd_use_tls and
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## - smtpd_enforce_tls. This parameter is ignored with
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## - "smtpd_tls_wrappermode = yes".
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#smtpd_use_tls=yes
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smtp_tls_security_level=may
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EOF
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fi
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cat <<EOF >> /etc/postfix/main.cf
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## - Aktiviert TLS für den Mailversand
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## -
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## - may:
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## - Opportunistic TLS: announce STARTTLS support to SMTP clients,
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## - but do not require that clients use TLS encryption.
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# smtp_use_tls=yes
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smtpd_tls_security_level=may
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## - 0 Disable logging of TLS activity.
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## - 1 Log TLS handshake and certificate information.
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## - 2 Log levels during TLS negotiation.
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## - 3 Log hexadecimal and ASCII dump of TLS negotiation process.
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## - 4 Also log hexadecimal and ASCII dump of complete transmission after STARTTLS.
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## -
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smtpd_tls_loglevel = 1
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smtp_tls_loglevel = 1
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smtpd_tls_cert_file = $_TLS_CERT_FILE
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smtpd_tls_key_file = $_TLS_KEY_FILE
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## - File with DH parameters that the Postfix SMTP server should use with EDH ciphers.
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## -
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## - Dont't forget to create it, e.g with openssl:
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## - openssl gendh -out /etc/postfix/ssl/dh_1024.pem -2 1024
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## -
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smtpd_tls_dh1024_param_file = /etc/postfix/ssl/dh_1024.pem
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## - also possible to use 2048 key with that parameter
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## -
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#smtpd_tls_dh1024_param_file = /etc/postfix/ssl/dh_2048.pem
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## - File with DH parameters that the Postfix SMTP server should use with EDH ciphers.
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## -
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## - Dont't forget to create it, e.g with openssl:
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## - openssl gendh -out /etc/postfix/ssl/dh_512.pem -2 512
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## -
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smtpd_tls_dh512_param_file = /etc/postfix/ssl/dh_512.pem
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## - File containing CA certificates of root CAs trusted to sign either remote SMTP
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## - server certificates or intermediate CA certificates. These are loaded into
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## - memory !! BEFORE !! the smtp(8) client enters the chroot jail.
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## -
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smtp_tls_CAfile = $_TLS_CA_FILE
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## - Directory with PEM format certificate authority certificates that the Postfix SMTP
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## - client uses to verify a remote SMTP server certificate. Don't forget to create the
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## - necessary "hash" links with, for example, "
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## - $OPENSSL_HOME/bin/c_rehash /etc/postfix/certs".
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## -
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## - !! Note !!
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## - To use this option in chroot mode, this directory (or a copy) must be inside
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## - the chroot jail.
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## -
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## - Note that a chrooted daemon resolves all filenames relative to the Postfix
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## - queue directory (/var/spool/postfix)
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## -
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#smtpd_tls_CApath = /etc/postfix/certs
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# Disable SSLv2 SSLv3 - Postfix SMTP server
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#
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# List of TLS protocols that the Postfix SMTP server will exclude or
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# include with opportunistic TLS encryption.
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smtpd_tls_protocols = !SSLv2, !SSLv3
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#
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# The SSL/TLS protocols accepted by the Postfix SMTP server
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# with mandatory TLS encryption.
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smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
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# Disable SSLv2 SSLv3 - Postfix SMTP client
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#
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# List of TLS protocols that the Postfix SMTP client will exclude or
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# include with opportunistic TLS encryption.
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smtp_tls_protocols = !SSLv2, !SSLv3
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#
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# List of SSL/TLS protocols that the Postfix SMTP client will use
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# with mandatory TLS encryption
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smtp_tls_mandatory_protocols = !SSLv2, !SSLv3
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## - Activate des "Ephemeral Elliptic Curve Diffie-Hellman" (EECDH) key exchange
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## - openssl > 1.0
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## -
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smtpd_tls_eecdh_grade = strong
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# standard list cryptographic algorithm
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tls_preempt_cipherlist = yes
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# Disable ciphers which are less than 256-bit:
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#
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#smtpd_tls_mandatory_ciphers = high
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#
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# opportunistic
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smtpd_tls_ciphers = high
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# Exclude ciphers
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#smtpd_tls_exclude_ciphers =
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# RC4
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# aNULL
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# SEED-SHA
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# EXP
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# MD5
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smtpd_tls_exclude_ciphers =
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aNULL
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eNULL
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EXPORT
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DES
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RC4
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MD5
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PSK
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aECDH
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EDH-DSS-DES-CBC3-SHA
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EDH-RSA-DES-CDC3-SHA
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KRB5-DE5, CBC3-SHA
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smtpd_tls_session_cache_database = btree:\${data_directory}/smtpd_scache
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smtp_tls_session_cache_database = btree:\${data_directory}/smtp_scache
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EOF
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if $_SASL_AUTH ; then
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echo "[$_RELAY_HOST] ${_SASL_USER}@${_RELAY_HOST}:$_SASL_PASS" > /etc/postfix/sasl_passwd
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chown root:root /etc/postfix/sasl_passwd
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chmod 600 /etc/postfix/sasl_passwd
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postmap /etc/postfix/sasl_passwd
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fi
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## - create directory for certificates and copy certificates
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## - and coresponding keys to /etc/postfix/ssl/
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## -
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mkdir -p /etc/postfix/ssl
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cp <zertificates and keys to> /etc/postfix/ssl/
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## - generate DH parameters that the Postfix SMTP server should use
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## - with EDH ciphers (length 512 and 1024
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## -
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openssl gendh -out /etc/postfix/ssl/dh_512.pem -2 512
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openssl gendh -out /etc/postfix/ssl/dh_1024.pem -2 1024
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openssl gendh -out /etc/postfix/ssl/dh_2048.pem -2 2048
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ln -s /etc/ssl/certs/ssl-cert-snakeoil.pem $_TLS_CERT_FILE
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ln -s /etc/ssl/private/ssl-cert-snakeoil.key $_TLS_KEY_FILE
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## - /etc/mailname
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## -
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echo $_HOSTNAME > /etc/mailname
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## - /etc/aliases
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## -
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cat << EOF > /etc/aliases
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# See man 5 aliases for format
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mailer-daemon: postmaster
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postmaster: root
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nobody: root
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hostmaster: root
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usenet: root
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news: root
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webmaster: root
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www: root
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ftp: root
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abuse: root
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noc: root
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security: root
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root: $_ADMIN_EMAIL
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EOF
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## - rebuld alias database
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## -
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newaliases
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cat << EOF >> /etc/rsyslog.d/postfix.conf
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#
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# Logging for the mail system. Split it up so that
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# it is easy to write scripts to parse these files.
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#
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mail.info -/var/log/mail.info
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mail.warn -/var/log/mail.warn
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mail.err /var/log/mail.err
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mail.* -/var/log/mail.log
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& ~
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EOF
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/etc/init.d/rsyslog restart
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