Major move around

opendkim/Dockerfile

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+FROM ubuntu:14.10
+
+ENV DEBIAN_FRONTEND noninteractive
+RUN locale-gen en_GB en_GB.UTF-8 && dpkg-reconfigure locales
+
+# Prerequisites
+RUN apt-get update && apt-get install -y \
+    opendkim && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+# configure settings script
+VOLUME ["/mail_settings"]
+COPY boot /boot
+RUN chmod 755 /boot
+
+# start necessary services for operation (dovecot -F starts dovecot in the foreground to prevent container exit)
+ENTRYPOINT /boot; service rsyslog start; opendkim -f

opendkim/boot

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+# Copy OpenDKIM config
+cp /mail_settings/opendkim.conf /etc/opendkim.conf
+cp /mail_settings/mail.private /etc/dkim.key
+chown opendkim:opendkim /etc/dkim.key
+chmod 600 /etc/dkim.key

opendkim/config/example/opendkim.conf

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+# Log to syslog
+Syslog                  yes
+# Required to use local socket with MTAs that access the socket as a non-
+# privileged user (e.g. Postfix)
+#UMask                  002
+# dkim-milter (2.5.2.dfsg-1ubuntu1) hardy:
+# Disable new umask option by default (not needed since Ubuntu default
+# uses a TCP socket instead of a Unix socket).
+
+# Attempt to become the specified userid before starting operations.
+#UserID                 105 # 'id postfix' in your shell
+
+
+# Sign for example.com with key in /etc/mail/dkim.key using
+# selector '2007' (e.g. 2007._domainkey.example.com)
+Domain                  example.com
+KeyFile                 /etc/dkim.key # See bellow how to generate and set up the key
+Selector                mail
+
+# Common settings. See dkim-filter.conf(5) for more information.
+AutoRestart             yes
+Background              yes
+Canonicalization        relaxed/relaxed
+DNSTimeout              5
+Mode                    sv
+SignatureAlgorithm      rsa-sha256
+SubDomains              no
+#UseASPDiscard          no
+#Version                rfc4871
+X-Header                no
+
+#InternalHosts          /etc/mail/dkim-InternalHosts.txt
+# The contents of /etc/mail/dkim-InternalHosts.txt should be
+#   127.0.0.1/8
+#   192.168.1.0/24
+#   other.internal.host.domain.tld
+# You need InternalHosts if you are signing e-mails on a gateway mail server
+# for each of the computers on your LAN.
+
+
+###############################################
+# Other (less-standard) configuration options #
+###############################################
+#
+# If enabled, log verification stats here
+Statistics              /var/log/dkim-filter/dkim-stats
+#
+# KeyList is a file containing tuples of key information. Requires
+# KeyFile to be unset. Each line of the file should be of the format:
+#    sender glob:signing domain:signing key file
+# Blank lines and lines beginning with # are ignored. Selector will be
+# derived from the key's filename.
+#KeyList                /etc/dkim-keys.conf
+#
+# If enabled, will generate verification failure reports for any messages
+# that fail signature verification. These will be sent to the r= address
+# in the policy record, if any.
+#ReportInfo             yes
+#
+# If enabled, will issue a Sendmail QUARANTINE for any messages that fail
+# signature verification, allowing them to be inspected later.
+#Quarantine             yes
+#
+# If enabled, will check for required headers when processing messages.
+# At a minimum, that means From: and Date: will be required. Messages not
+# containing the required headers will not be signed or verified, but will
+# be passed through
+#RequiredHeaders        yes