added postfix, z-push, dagent

postfix/Dockerfile

@@ -3,17 +3,8 @@ FROM alpine:latest
 # install apt packages
 ENV TZ Europe/Berlin 
 RUN apk add --no-cache postfix spamassassin rsyslog logrotate xz
-# install s6 process manager
-ADD https://github.com/just-containers/s6-overlay/releases/download/v3.1.1.2/s6-overlay-noarch.tar.xz /tmp
-ADD https://github.com/just-containers/s6-overlay/releases/download/v3.1.1.2/s6-overlay-x86_64.tar.xz /tmp
-RUN <<EOF 
-tar -C / -Jxpf /tmp/s6-overlay-noarch.tar.xz
-tar -C / -Jxpf /tmp/s6-overlay-x86_64.tar.xz
-EOF
-COPY ./etc/s6-overlay /etc/s6-overlay
-# install kopano core
-WORKDIR /root
+COPY --chmod=0775 entrypoint.sh /entrypoint.sh
 EXPOSE 25
 VOLUME /var/spool/postfix
-# HEALTHCHECK --start-period=350s CMD echo QUIT|nc localhost 25|grep "220 .* ESMTP Postfix"
-ENTRYPOINT ["/init"]
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["postfix", "start-fg"]

postfix/entrypoint.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+set -e
+exec "$@"