2020-09-26 09:17:53 +00:00
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# Postfix-Relay
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2021-03-02 16:38:40 +00:00
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[](https://drone.autonomic.zone/coop-cloud/postfix-relay)
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<!-- metadata -->
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* **Category**: Utilities
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* **Status**: ❷💛
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* **Image**: [`boky/postfix`](https://hub.docker.com/r/boky/postfix/), ❶💚, upstream
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* **Healthcheck**: Yes
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* **Backups**: No
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* **Email**: N/A
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* **Tests**: ❷💛
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* **SSO**: N/A
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<!-- endmetadata -->
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Centralised email delivery for all your `coop-cloud` apps using the
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2020-09-26 14:18:02 +00:00
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[`boky/postfix`] outgoing-only mail image.
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The basic idea is to run one instance of this on each swarm, and configure that
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swarm's apps to send all their email through it.
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By default, this stack will try to deliver e-mail directly (i.e. looking up the
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2020-09-27 20:04:31 +00:00
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recipient's mail server using `MX` records). **NOTE**: make sure that:
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2020-09-27 19:36:04 +00:00
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- your Traefik server and host firewall are configured to allow port 587,
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- you have an MX record for your configured `$DOMAIN` pointing to this server,
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- you have an SPF record for `$DOMAIN` that includes `mx` or this server's IP
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- you have a reverse DNS (rDNS / PTR) record for this IP that matches `$DOMAIN`
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(These requirements mean that you can only deploy one direct-delivery instance
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of this app per swarm host..)
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2020-09-26 14:18:02 +00:00
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Alternatively, you can easily route mail through a smarthost / relay host like
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Mailgun or Gandi -- see [`RELAYHOST` and related parameters][boky-postfix-options].
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FIXME 3wc: Pass `RELAYHOST` etc. from `.envrc` to service
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2020-09-26 09:17:53 +00:00
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## Basic usage
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2021-03-02 16:38:40 +00:00
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1. Set up Docker Swarm and [`abra`][abra]
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2. Deploy [`coop-cloud/traefik`][compose-traefik]
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3. `abra app new postfix-relay`
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4. `abra app YOURAPPDOMAIN config` - be sure to change `$DOMAIN` to something that resolves to
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your Docker swarm box
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5. `abra app YOURAPPDOMAIN deploy`
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2020-09-26 14:18:02 +00:00
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## Using this in other stacks
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Add the other service to the (internal) `mail` network, and set whatever options
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2020-09-27 11:15:32 +00:00
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the image supports for auto-configuring SMTP settings.
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2020-09-26 14:18:02 +00:00
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For reusable stacks, you probably want to put this configuration in a separate
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`compose.mailrelay.yml` file, e.g. [the version in
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`coop-cloud/wordpress`][wordpress-compose].
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2020-09-27 20:00:20 +00:00
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[`boky/postfix`]: https://hub.docker.com/r/boky/postfix
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[boky-postfix-options]: https://github.com/bokysan/docker-postfix#postfix-specific-options
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2020-09-26 09:17:53 +00:00
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[`abra`]: https://git.autonomic.zone/autonomic-cooperative/abra
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[`coop-cloud/traefik`]: https://git.autonomic.zone/coop-cloud/traefik
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[wordpress-compose]: https://git.autonomic.zone/coop-cloud/wordpress/src/branch/master/compose.mailrelay.yml
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