mirror of
https://github.com/bokysan/docker-postfix.git
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aa66569ac1
This update includes a few features that make it easier to work with relay hosts. The configuration now uses built-in (Alpine) TLS certificates and allows the user to specify how the Postfix should establish a TLS connection. Configure it using `RELAYHOST_TLS_LEVEL`, if needed. Another configuration option was added, `MESSAGE_SIZE_LIMIT`, which enables you to reject messages exceeding certain limits. Especially useful with relay servers, to prevent messages getting stuck in Postfix queue. Use the `INBOUND_DEBUGGING` parameter to enable additional postfix logs for incoming messages when things go south. Use `TZ` parameter to set the timezone of the container (especially useful for logs and dates in the messages). *Notice that `ALLOWED_SENDER_DOMAINS` is now a neccessary parameter.* Turns out that due to Postfix anti-spam configuration there's no way to start it properly without specifying the domains it will relay email for. This commit also includes a few samples of running the container: - standalone - in [docker-compose](https://docs.docker.com/compose/) Further work: add a working Kubernetes / Helm chart example.
49 lines
1.6 KiB
Docker
49 lines
1.6 KiB
Docker
FROM alpine:latest
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MAINTAINER Bojan Cekrlic - https://github.com/bokysan/docker-postfix/
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# See README.md for details
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# Set the timezone for the container, if needed.
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ENV TZ=
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# Postfix myhostname
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ENV HOSTNAME=
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# Host that relays your msgs
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ENV RELAYHOST=
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# An (optional) username for the relay server
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ENV RELAYHOST_USERNAME=
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# An (optional) login password for the relay server
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ENV RELAYHOST_PASSWORD=
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# Define relay host TLS connection level. See http://www.postfix.org/postconf.5.html#smtp_tls_security_level for details.
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# By default, the permissive level ("may") is used, if not defined.
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ENV RELAYHOST_TLS_LEVEL=
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# Allow domains from per Network ( default 127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16 )
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ENV MYNETWORKS=127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16
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# Allow any sender domains
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ENV ALLOWED_SENDER_DOMAINS=
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# Attachments size. 0 means unlimited. Usually needs to be set if your relay host has an attachment size limit
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ENV MESSAGE_SIZE_LIMIT=
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# Enable additional debugging for connections to postfix
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ENV INBOUND_DEBUGGING=
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# Install supervisor, postfix
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RUN true && \
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apk add --no-cache --update postfix ca-certificates tzdata supervisor rsyslog && \
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apk add --no-cache --upgrade musl musl-utils && \
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(rm "/tmp/"* 2>/dev/null || true) && (rm -rf /var/cache/apk/* 2>/dev/null || true)
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# Set up configuration
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COPY supervisord.conf /etc/supervisord.conf
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COPY rsyslog.conf /etc/rsyslog.conf
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COPY run.sh /run.sh
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RUN chmod +x /run.sh
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# Set up spool volume
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VOLUME [ "/var/spool/postfix", "/etc/postfix" ]
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# Run supervisord
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USER root
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WORKDIR /tmp
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EXPOSE 587
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ENTRYPOINT ["/run.sh"]
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