Dockerfile

FROM alpine:latest
MAINTAINER Mike Kelly <pioto@pioto.org>

ARG BUILD_DATE
ARG VCS_REF
LABEL org.label-schema.build-date=$BUILD_DATE \
      org.label-schema.name="postfix-relay" \
      org.label-schema.description="Postfix Mail Relay in a Docker container, with full autobuild support." \
      org.label-schema.vcs-ref=$VCS_REF \
      org.label-schema.vcs-url="https://github.com/pioto/docker-mail-relay" \
      org.label-schema.docker.cmd="docker run -d -h relay.example.com --name=mailrelay -e SMTP_LOGIN=myLogin -e SMTP_PASSWORD=myPassword -p 25:25 pioto/postfix-relay" \
      org.label-schema.schema-version="1.0"

# Packages: update
RUN apk -U add postfix ca-certificates libsasl py-pip supervisor rsyslog \
  cyrus-sasl-plain cyrus-sasl-crammd5 cyrus-sasl-digestmd5 cyrus-sasl-login
RUN pip install j2cli

# Add files
ADD conf /root/conf
RUN mkfifo /var/spool/postfix/public/pickup \
    && ln -s /etc/postfix/aliases /etc/aliases

# Configure: supervisor
ADD bin/dfg.sh /usr/local/bin/
ADD conf/supervisor-all.ini /etc/supervisor.d/

# Runner
ADD run.sh /root/run.sh
RUN chmod +x /root/run.sh

# Declare
EXPOSE 25

CMD ["/root/run.sh"]