init

Dockerfile

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+FROM gentoo/portage:latest as portage
+FROM gentoo/stage3:amd64
+
+COPY --from=portage /var/db/repos/gentoo /var/db/repos/gentoo
+
+# courier and pythonfilter install + activate + cleanup
+RUN echo '=mail-filter/courier-pythonfilter-3.0.2-r1' > /etc/portage/package.accept_keywords && \
+	emerge mail-mta/courier mail-filter/courier-pythonfilter dev-python/pyspf dev-python/pydns && \
+	ln -s /usr/bin/pythonfilter /usr/libexec/filters && \
+	filterctl start pythonfilter && \
+	rm -rf /var/db/repos/gentoo
+
+# courier config
+RUN sed -i 's;^TCPDOPTS=.\+$;TCPDOPTS="-stderrlogger=/usr/sbin/courierlogger -nodnslookup -noidentlookup";' /etc/courier/esmtpd && \
+	sed -i 's;^TCPDOPTS=.\+$;TCPDOPTS="-stderrlogger=/usr/sbin/courierlogger -nodnslookup -noidentlookup";' /etc/courier/imapd && \
+	sed -i 's;^DEFAULTDELIVERY=.\+$;DEFAULTDELIVERY="| /usr/bin/maildrop";' /etc/courier/courierd && \
+	sed -i 's;^MAILDROPDEFAULT=.\+$;MAILDROPDEFAULT="./maildir";' /etc/courier/courierd && \
+	sed -i 's;^authmodulelist=.\+$;authmodulelist="authuserdb";' /etc/courier/authlib/authdaemonrc
+#RUN sed -i 's;^DEFAULTDELIVERY=.\+$;DEFAULTDELIVERY="./maildir";' /etc/courier/courierd
+
+# courier runtime
+ADD start.sh /
+RUN chmod +x /start.sh
+
+ADD userdb.example /etc/courier/authlib
+
+EXPOSE 25
+EXPOSE 143
+EXPOSE 993
+
+VOLUME /conf
+VOLUME /mail
+
+CMD /start.sh