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52cf117e8b
Refer fd39392ec5 as well
Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
113 lines
5.4 KiB
Markdown
113 lines
5.4 KiB
Markdown
<!--
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SPDX-FileCopyrightText: 2022 - 2024 Slavi Pantaleev
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SPDX-FileCopyrightText: 2022 Nikita Chernyi
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SPDX-FileCopyrightText: 2023 Luke D Iremadze
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SPDX-FileCopyrightText: 2024 - 2025 Suguru Hirahara
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SPDX-License-Identifier: AGPL-3.0-or-later
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-->
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# Setting up Postmoogle email bridging (optional)
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The playbook can install and configure [Postmoogle](https://github.com/etkecc/postmoogle) for you.
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Postmoogle is a bridge you can use to have its bot user forward emails to Matrix rooms. It runs an SMTP email server and allows you to assign mailbox addresses to the rooms.
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See the project's [documentation](https://github.com/etkecc/postmoogle/blob/master/README.md) to learn what it does and why it might be useful to you.
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## Prerequisites
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Open the following ports on your server to be able to receive incoming emails:
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- `25/tcp`: SMTP
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- `587/tcp`: Submission (TLS-encrypted SMTP)
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If you don't open these ports, you will still be able to send emails, but not receive any.
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These port numbers are configurable via the `matrix_postmoogle_smtp_host_bind_port` and `matrix_postmoogle_submission_host_bind_port` variables, but other email servers will try to deliver on these default (standard) ports, so changing them is of little use.
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## Adjusting DNS records
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To make Postmoogle enable its email sending features, you need to configure MX and TXT (SPF, DMARC, and DKIM) records. See the table below for values which need to be specified.
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| Type | Host | Priority | Weight | Port | Target |
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|------|--------------------------------|----------|--------|------|------------------------------------|
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| MX | `matrix` | 10 | 0 | - | `matrix.example.com` |
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| TXT | `matrix` | - | - | - | `v=spf1 ip4:matrix-server-IP -all` |
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| TXT | `_dmarc.matrix` | - | - | - | `v=DMARC1; p=quarantine;` |
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| TXT | `postmoogle._domainkey.matrix` | - | - | - | get it from `!pm dkim` |
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**Note**: the DKIM record can be retrieved after configuring and installing the bridge's bot.
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## Adjusting the playbook configuration
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Add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file:
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```yaml
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matrix_postmoogle_enabled: true
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# Uncomment and adjust this part if you'd like to use a username different than the default
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# matrix_postmoogle_login: postmoogle
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# Generate a strong password for the bot. You can create one with a command like `pwgen -s 64 1`.
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matrix_postmoogle_password: PASSWORD_FOR_THE_BOT
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# Uncomment to add one or more admins to this bridge:
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#
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# matrix_postmoogle_admins:
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# - '@yourAdminAccount:{{ matrix_domain }}'
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#
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# … unless you've made yourself an admin of all bots/bridges like this:
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#
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# matrix_admin: '@yourAdminAccount:{{ matrix_domain }}'
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```
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### Extending the configuration
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There are some additional things you may wish to configure about the bridge.
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Take a look at:
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- `roles/custom/matrix-bridge-postmoogle/defaults/main.yml` for some variables that you can customize via your `vars.yml` file
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## Installing
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After configuring the playbook, run it with [playbook tags](playbook-tags.md) as below:
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<!-- NOTE: let this conservative command run (instead of install-all) to make it clear that failure of the command means something is clearly broken. -->
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```sh
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ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,ensure-matrix-users-created,start
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```
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**Notes**:
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- The `ensure-matrix-users-created` playbook tag makes the playbook automatically create a user account of the bridge's bot.
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- The shortcut commands with the [`just` program](just.md) are also available: `just install-all` or `just setup-all`
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`just install-all` is useful for maintaining your setup quickly ([2x-5x faster](../CHANGELOG.md#2x-5x-performance-improvements-in-playbook-runtime) than `just setup-all`) when its components remain unchanged. If you adjust your `vars.yml` to remove other components, you'd need to run `just setup-all`, or these components will still remain installed.
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- If you change the bridge's bot password (`matrix_postmoogle_password` in your `vars.yml` file) subsequently, the bot user's credentials on the homeserver won't be updated automatically. If you'd like to change the bot user's password, use a tool like [synapse-admin](configuring-playbook-synapse-admin.md) to change it, and then update `matrix_postmoogle_password` to let the bot know its new password.
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## Usage
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To use the bridge, invite the `@postmoogle:example.com` bot user into a room you want to use as a mailbox.
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Then send `!pm mailbox NAME` to expose this Matrix room as an inbox with the email address `NAME@matrix.example.com`. Emails sent to that email address will be forwarded to the room.
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Send `!pm help` to the bot in the room to see the available commands.
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You can also refer to the upstream [documentation](https://github.com/etkecc/postmoogle).
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## Troubleshooting
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As with all other services, you can find the logs in [systemd-journald](https://www.freedesktop.org/software/systemd/man/systemd-journald.service.html) by logging in to the server with SSH and running `journalctl -fu matrix-postmoogle`.
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### Increase logging verbosity
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The default logging level for this component is `INFO`. If you want to increase the verbosity, add the following configuration to your `vars.yml` file and re-run the playbook:
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```yaml
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matrix_postmoogle_loglevel: 'DEBUG'
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```
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