FROM centos:8

RUN useradd -m -s /bin/false vmail

RUN dnf install -y epel-release && dnf update -y \
  && dnf clean all \
  && rm -rf /var/cache/yum

RUN dnf --nogpg install -y https://mirror.ghettoforge.org/distributions/gf/el/8/gf/x86_64/gf-release-8-11.gf.el8.noarch.rpm \
  && dnf install -y --enablerepo=gf-plus postfix3-3.5.8 postfix3-ldap-3.5.8 postfix3-mysql-3.5.8 postfix3-pgsql-3.5.8 \
  && dnf install -y dovecot-2.3.8 dovecot-pigeonhole-2.3.8 opendkim-2.11.0 opendmarc-1.3.2 \
  && dnf install -y cyrus-sasl cyrus-sasl-plain cyrus-sasl-md5 pypolicyd-spf \
  && dnf clean all \
  && rm -rf /var/cache/yum

EXPOSE 8891

CMD ["/usr/sbin/opendkim", "-f", "-x", "/etc/opendkim/opendkim.conf"]