FROM debian:bookworm-slim

RUN apt-get update && \
    apt-get -y upgrade && \
    apt-get -y --purge autoremove && \
    apt-get -y install postfix && \
    apt-get -y clean

EXPOSE 25/tcp
EXPOSE 465/tcp
EXPOSE 587/tcp

CMD ["/usr/sbin/postfix", "start-fg"]