docker-postfix/alpine-38.dockerfile at master · tozd/docker-postfix · GitHub

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FROM registry.gitlab.com/tozd/docker/dinit:alpine-38

EXPOSE 25/tcp 465/tcp 587/tcp

VOLUME /var/log/postfix
VOLUME /var/spool/postfix

ENV MAILNAME=mail.example.com
ENV MY_NETWORKS="172.17.0.0/16 127.0.0.0/8"
ENV MY_DESTINATION="localhost.localdomain, localhost"
ENV ROOT_ALIAS="admin@example.com"

# /etc/aliases should be available at postfix installation.
COPY ./etc/aliases /etc/aliases

RUN apk add --no-cache postfix postfix-pcre rsyslog sed && \
  addgroup -S syslog && \
  adduser -S -G syslog syslog

# We disable IPv6 for now, IPv6 is available in Docker even if the host does not have IPv6 connectivity.
RUN postconf -e mydestination="localhost.localdomain, localhost" && \
  postconf -e smtpd_banner='$myhostname ESMTP $mail_name' && \
  postconf -# myhostname && \
  postconf -e inet_protocols=ipv4 && \
  sed -i 's/\/var\/log\/mail/\/var\/log\/postfix\/mail/' /etc/rsyslog.conf && \
  sed -i '/imklog/s/^/#/' /etc/rsyslog.conf

ENV POSTFIX_PATH="/usr/lib/postfix/master"

COPY ./etc-2/aliases /etc/aliases
COPY ./etc-2/service/postfix /etc/service/postfix
COPY ./etc-2/service/rsyslog /etc/service/rsyslog