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"]