docker/docker-mail
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93378dee86abe5f1ee86e824f2543656e1826e64
docker-mail/dockerfile
Jon Lockwood 93378dee86 fix(backup): /var/spool/postfix needs to be backed up 
As this folder contains the mta folders and queue. It must be
backed up as mail could be lost that is awaiting delivery.

MR !9
2022-02-19 11:29:44 +09:30

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FROM debian:bullseye-slim
LABEL \
#org.opencontainers.image.created="" \ # set during build with $(date --rfc-3339=seconds) \
org.opencontainers.image.authors="No Fuss Computing" \
#org.opencontainers.image.url="" # $CI_PROJECT_URL/-/releases/$CI_COMMIT_TAG set during build from url\
#org.opencontainers.image.documentation="" # $CI_PROJECT_URL/pages Set URL during build \
#org.opencontainers.image.source="" # $CI_PROJECT_URL Set URL during build \
#org.opencontainers.image.version="" \ # $(cz -n cz_nfc version --project) ) Set during build from .cz.yml
#org.opencontainers.image.revision="" # $CI_COMMIT_SHA set during build from git commit \
org.opencontainers.image.vendor="No Fuss Computing" \
#License(s) under which contained software is distributed as an SPDX License Expression.
org.opencontainers.image.licenses="" \
org.opencontainers.image.title="No Fuss Computings docker mail server" \
org.opencontainers.image.description="A Complete mailserver in a container"
# Install dependencies
RUN apt update && DEBIAN_FRONTEND=noninteractive apt -y --no-install-recommends install \
curl \
gpg \
gpg-agent \
apt-transport-https \
ca-certificates \
supervisor
RUN curl https://repo.dovecot.org/DOVECOT-REPO-GPG | gpg --import && \
gpg --export ED409DA1 > /etc/apt/trusted.gpg.d/dovecot.gpg
RUN echo "deb https://repo.dovecot.org/ce-2.3-latest/debian/bullseye bullseye main" > /etc/apt/sources.list.d/dovecot.list
RUN apt update && DEBIAN_FRONTEND=noninteractive apt -y --no-install-recommends install \
# System Apps
cron \
rsyslog \
logrotate \
# Dovecot
dovecot-core=2:2.3.18-4+debian11 \
dovecot-imapd=2:2.3.18-4+debian11 \
dovecot-lmtpd=2:2.3.18-4+debian11 \
dovecot-ldap=2:2.3.18-4+debian11 \
dovecot-sieve=2:2.3.18-4+debian11 \
dovecot-managesieved=2:2.3.18-4+debian11 \
# Postfix
postfix=3.5.6-1+b1 \
postfix-ldap=3.5.6-1+b1 \
libsasl2-modules \
sasl2-bin \
# Amavis
amavisd-new=1:2.11.1-5 \
spamassassin=3.4.6-1 \
spamc=3.4.6-1 \
# Amavis decoders
arj bzip2 cabextract cpio file gzip nomarch pax unzip zip xzdec lrzip lzop rpm2cpio unrar-free p7zip-full lz4 \
# clamav=0.103.5+dfsg-0+deb11u1 \
# clamav-daemon=0.103.5+dfsg-0+deb11u1 \
libmailtools-perl=2.21-1 \
fam=2.7.0-17.3 \
libnet-dns-perl=1.29-1 \
# Fetchmail
fetchmail=6.4.16-4+deb11u1 \
# Perl Modules for fetchmail.pl
# DBI
libdbix-easy-perl \
# LockFile::Simple
liblockfile-simple-perl \
# DBD::mysql
libclass-dbi-mysql-perl \
# Sys::Syslog
liblogger-syslog-perl \
# LockFile::Simple
libio-lockedfile-perl \
# DKIM
opendkim=2.11.0~beta2-4 \
opendkim-tools=2.11.0~beta2-4 \
# SPF
postfix-policyd-spf-python=2.9.2-1
# Cleanup, remove cron jobs not required
RUN rm -f /etc/cron.d/e2scrub_all \
&& rm -f /etc/cron.daily/apt-compat \
&& rm -f /etc/cron.daily/dpkg \
&& rm -f /etc/cron.daily/logrotate
COPY include/ /
RUN chmod +x /docker-entrypoint.sh \
# Create vmail user for system
&& groupadd -g 5000 vmail \
&& useradd -g vmail -u 5000 vmail -d /var/vmail \
# Ensure Backup directory is created
&& mkdir /backup \
&& chown root:root /backup \
&& chmod 700 /backup \
# create SSL directory for ssl certificates
&& mkdir -p /certs \
# Ensure scripts are executable
&& chmod +x /bin/backup.sh \
# Dovecot related commands
&& mkdir -p /srv/mail \
&& chown vmail:vmail /srv/mail \
&& chmod 765 -R /srv/mail \
&& mkdir -p /certs/dovecot \
&& chown dovecot:dovecot -R /etc/dovecot/ \
&& chgrp postfix -R /etc/dovecot/sieve/ \
&& chmod 0755 -R /etc/dovecot/sieve/ \
# ensure dovecot related scripts are executable
&& chmod +x /bin/quota-warning.sh \
&& chmod +x /bin/welcome-email.sh \
&& chmod +x /bin/group-mailbox.sh \
&& chmod 744 /etc/dovecot/dovecot-acl \
# Postfix related commands
&& usermod -a -G vmail postfix \
&& mkdir -p /certs/postfix \
&& ln -s /etc/dovecot/dovecot-ldap.conf.ext /etc/dovecot/dovecot-ldap-userdb.conf.ext \
# ensure postfix related scripts are executable
&& chmod +x /bin/postfix.sh \
# check if needed
&& mkdir -p /var/spool/postfix/private/dovecot \
&& chown postfix:postfix /var/spool/postfix/private/dovecot \
&& chown vmail:vmail /var/lib/dovecot \
# Spammassassin related Commands
&& mkdir -p /var/spool/spamassassin \
&& chmod 777 /var/spool/spamassassin \
&& usermod -a -G vmail debian-spamd \
&& chown debian-spamd:vmail -R /var/spool/spamassassin \
# Ensure spamassassin related scripts are executable
&& chmod +x /bin/spam-learn.sh \
# fetchmail.pl setup
&& curl -o /bin/fetchmail.pl https://raw.githubusercontent.com/postfixadmin/postfixadmin/8f20c96278a694a7e0bb570f1d56c208105e5a14/ADDITIONS/fetchmail.pl \
&& chmod +x /bin/fetchmail.pl \
&& mkdir -p /var/run/fetchmail \
&& mkdir -p /var/lock/fetchmail \
# Amavis DKIM related commands
&& mkdir -p /certs/amavis/dkim/ \
&& chown root:amavis /certs/amavis/dkim/ \
&& chmod 750 /certs/amavis/dkim/ \
&& usermod -a -G vmail amavis \
&& usermod -a -G vmail opendkim
# Setup data volumes
VOLUME /srv/mail /certs /var/spool/postfix /var/spool/spamassassin /backup /var/log
# Configure postfix
RUN postconf -e "maillog_file=/var/log/postfix.log" \
# Postfix to use dovecot LMTP
&& postconf -e "virtual_transport=lmtp:unix:private/lda" \
# # Only allow a user to send from email address' they own
# && postconf -e "smtpd_sender_login_maps=ldap:/etc/postfix/ldap/smtpd_sender_login_maps" \
# Only allow specified domains for usage
&& postconf -e "virtual_mailbox_domains=ldap:/etc/postfix/ldap/virtual_email_domains" \
# postfix user mapping
&& postconf -e "virtual_alias_maps=ldap:/etc/postfix/ldap/virtual_alias_maps" \
# Only trust localhost
&& postconf -e "mynetworks_style = host" \
# by default encryption is optional
&& postconf -e "smtpd_tls_security_level=may" \
# log outbound tls connection information
&& postconf -e "smtpd_tls_loglevel=1" \
# try tls connection outbound
&& postconf -e "smtp_tls_security_level=may" \
# log inbound tls connection information
&& postconf -e "smtp_tls_loglevel=1" \
# Only authenticate over tls
&& postconf -e "smtpd_tls_auth_only=yes" \
# all smtpd actions need to be filtered
&& postconf -e "content_filter=amavis:[127.0.0.1]:10024" \
# not give away os, set clean banner
&& postconf -e "smtpd_banner=$myhostname ESMTP " \
# Dont give away that postfix is used
&& postconf -e "mail_name=server" \
# create privacy header check db
&& postmap /etc/postfix/header_checks_privacy \
# create clean header check db
&& postmap /etc/postfix/header_checks_outbound \
# Clean outbound headers
&& postconf -e "smtp_header_checks=regexp:/etc/postfix/header_checks_outbound" \
# Add To, From, Date and Message-id headers if missing
&& postconf -e "always_add_missing_headers=yes" \
# Only add missing headers for authenticated users (mail users) and my networks and mail orginating from localhost
&& postconf -e "local_header_rewrite_clients=permit_sasl_authenticated,permit_mynetworks,permit_inet_interfaces" \
# set tls settings
&& postconf -e "tls_preempt_cipherlist = yes" \
&& postconf -e "tls_ssl_options = NO_COMPRESSION, NO_RENEGOTIATION" \
&& postconf -e "smtpd_tls_cert_file=/certs/postfix/cert.pem" \
&& postconf -e "smtpd_tls_key_file=/certs/postfix/key.pem" \
&& postconf -e "smtpd_helo_required = yes" \
&& postconf -e "smtpd_delay_reject = yes" \
&& postconf -e "disable_vrfy_command = yes" \
# use secure protocols and cyphers
# Generated by https://ssl-config.mozilla.org/
#&& postconf -e "smtpd_tls_mandatory_ciphers=high" \
&& postconf -e "smtpd_tls_protocols=!SSLv2,!SSLv3,!TLSv1,!TLSv1.1" \
&& postconf -e "smtp_tls_protocols=!SSLv2,!SSLv3,!TLSv1,!TLSv1.1" \
&& postconf -e "smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3,!TLSv1,!TLSv1.1" \
&& postconf -e "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" \
# SPF postfix Settings
&& postconf -e "policyd-spf_time_limit=3600" \
# Connection defaults to reject where possible/advised
# Client command restrictions
&& postconf -e "smtpd_client_restrictions=reject_unauth_destination,reject_unauth_pipelining,permit_mynetworks,permit_auth_destination,reject" \
# HELO/EHLO restrictions
&& postconf -e "smtpd_helo_restrictions=permit_mynetworks,reject_invalid_helo_hostname,permit" \
# MAIL FROM restrictions
&& postconf -e "smtpd_sender_restrictions=permit_mynetworks,reject_non_fqdn_sender,permit" \
# RCPT TO restrictions
&& postconf -e "smtpd_recipient_restrictions=permit_mynetworks,reject_non_fqdn_recipient,reject_unknown_recipient_domain,reject_unauth_destination,check_policy_service,unix:private/policyd-spf,check_policy_service unix:private/quota,permit_auth_destination,reject" \
# RCPT TO restrictions
&& postconf -e "smtpd_relay_restrictions=reject_non_fqdn_recipient,permit_auth_destination,reject" \
&& postconf -e "smtpd_sasl_security_options = noanonymous"
EXPOSE 25 587 993 4190
ENTRYPOINT ["/docker-entrypoint.sh"]
# testing software
RUN apt update && DEBIAN_FRONTEND=noninteractive apt -y --no-install-recommends install \
procps \
vim \
iputils-ping \
python3-ldap \
net-tools
# && freshclam
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