Dockerfile

FROM ubuntu:20.04

RUN apt -y update && yes "2" | apt -y --no-install-recommends install openssl telnet vim ruby tzdata postfix opendkim
RUN gem install mail
RUN  mv /etc/postfix/main.cf /etc/postfix/main.cf.org
COPY postfix/mailname /etc/
COPY postfix/main.cf /etc/postfix/
COPY postfix/master.cf /etc/postfix/
RUN  chmod 644 /etc/postfix/master.cf /etc/postfix/main.cf

RUN  mv /etc/opendkim.conf /etc/opendkim.conf.org
COPY opendkim/opendkim.conf /etc/
COPY opendkim/TrustedHosts  /etc/opendkim/

# メールのログ関係
RUN  mkdir /opt/maillog
RUN  mkdir /opt/maillog/log
RUN  mkdir /opt/maillog/log/list
RUN  mkdir /opt/maillog/log/raw
COPY postfix/log.rb /opt/maillog
RUN  chmod -R 777 /opt/maillog
RUN  mkdir /mailraw;  chmod 777 /mailraw
RUN  mkdir /maillsit; chmod 777 /maillsit
RUN  echo 'logging: "|/usr/bin/ruby /opt/maillog/log.rb"' >> /etc/aliases
RUN  newaliases

COPY scripts/startup.sh /tmp
COPY scripts/setup.sh   /tmp

ENTRYPOINT ["/bin/bash", "/tmp/startup.sh"]

EXPOSE 25