FROM debian:buster

EXPOSE 24

RUN DEBIAN_FRONTEND=noninteractive && \
	apt-get update && \
	apt-get install -y --no-install-recommends \
	    postgrey && \
	apt-get clean && \
	rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

VOLUME /var/lib/postgrey

ENTRYPOINT ["postgrey", "--inet=0.0.0.0:24"]