coreos-home-server/config/service/postfix/Containerfile

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FROM docker.io/debian:bullseye-slim
ARG VERSION=3.5.6
RUN apt-get update -y && apt-get install -y --no-install-recommends \
postfix=${VERSION}* postfix-mysql=${VERSION}* syslog-ng-core gettext ca-certificates
COPY container/config /etc/postfix
COPY container/run-postfix /run-postfix
RUN addgroup --system --gid 5000 virtual
RUN adduser --system --uid 5000 --ingroup virtual --home /var/mail/virtual virtual
EXPOSE 25 465 587
ENTRYPOINT ["/run-postfix"]