FROM daocloud.io/library/centos:centos7 LABEL Name=postfix Version=0.0.1 RUN yum install postfix RUN sed -i "s|inet_protocols = all|inet_protocols = ipv4|g" /etc/postfix/main.cf RUN rm -Rf /var/lib/apt/lists/* CMD ["/usr/sbin/postfix", "start"]
