FROM debian:bookworm

LABEL Maintainer="Wolfgang Hottgenroth <woho@hottis.de>"
LABEL ImageName=""

# domain to be used in sender address of sent mails
ENV LOCALMAILNAME=""
# smarthost to send mail to
ENV SMARTHOST=""
# recipient addresses for root aliases, separate multiple addresses by space
ENV ROOT=""
# ip addresses or networks to allow for relaying, separate multiple ones by semicolon
ENV RELAYNETS=""

RUN \
  apt update && \
  apt upgrade -y --autoremove && \
  apt install -y exim4-daemon-light ca-certificates curl && \ 
  rm -rf /var/lib/apt/lists/*

COPY update-exim4.conf.tmpl /etc/exim4/
COPY aliases.tmpl /etc/exim4/
COPY adjust-config.sh /etc/exim4/
COPY start.sh /etc/exim4/

WORKDIR /etc/exim4

EXPOSE 25

CMD [ "./start.sh" ]