FROM rockylinux/rockylinux: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 install -y postfix-3.5.8 postfix-ldap-3.5.8 postfix-mysql-3.5.8 postfix-pgsql-3.5.8 \
  dovecot-2.3.8 dovecot-pigeonhole-2.3.8 opendkim-2.11.0 opendmarc-1.4.1.1 \
  cyrus-sasl cyrus-sasl-plain cyrus-sasl-md5 pypolicyd-spf \
  && dnf clean all \
  && rm -rf /var/cache/yum

EXPOSE 110 143 993 995

CMD ["/usr/sbin/dovecot", "-F"]