FROM alpine:3.6 MAINTAINER Ianus IT GmbH <info@ianus-it.de> RUN apk add --update ca-certificates postfix postfix-pcre postfix-policyd-spf-perl rsyslog &&\ rm -rf /var/cache/apk/* COPY files/defaults/ /defaults/ COPY files/start.sh /start.sh RUN echo "policy-spf unix - n n - - spawn user=nobody argv=/usr/bin/postfix-policyd-spf-perl" >> /etc/postfix/master.cf &&\ chmod +x /start.sh CMD ["/start.sh"]