FROM alpine:latest

RUN apk --no-cache add postfix bash openssl

COPY startup.sh /usr/bin/startup.sh
RUN chmod +x /usr/bin/startup.sh
COPY main.cf /etc/postfix/main.cf
COPY virtual /etc/postfix/virtual
COPY vmailbox /etc/postfix/vmailbox

EXPOSE 25
EXPOSE 465
EXPOSE 587

CMD [ "startup.sh" ]