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Better incorporate the new, great documentation (#1878)
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Georg Lauterbach
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README.md
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README.md
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# Docker Mailserver
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[![ci::status]][ci::github] [![docker::pulls]][docker::hub]
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[![ci::status]][ci::github] [![docker::pulls]][docker::hub] [![documentation::badge]][documentation::web]
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[ci::status]: https://img.shields.io/github/workflow/status/docker-mailserver/docker-mailserver/Build%2C%20Test%20%26%20Deploy?color=blue&label=CI&logo=github&logoColor=white&style=for-the-badge
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[ci::github]: https://github.com/docker-mailserver/docker-mailserver/actions
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[docker::pulls]: https://img.shields.io/docker/pulls/mailserver/docker-mailserver.svg?style=for-the-badge&logo=docker&logoColor=white
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[docker::hub]: https://hub.docker.com/r/mailserver/docker-mailserver/
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[documentation::badge]: https://img.shields.io/badge/DOCUMENTATION-GH%20PAGES-0078D4?style=for-the-badge&logo=git&logoColor=white
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[documentation::web]: https://docker-mailserver.github.io/docker-mailserver/edge/
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A fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.). Only configuration files, no SQL database. Keep it simple and versioned. Easy to deploy and upgrade.
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A fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.). Only configuration files, no SQL database. Keep it simple and versioned. Easy to deploy and upgrade. [Documentation][documentation::web] via MkDocs. [Why this image was created.](https://tvi.al/simple-mail-server-with-docker/).
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[Why this image was created.](http://tvi.al/simple-mail-server-with-docker/)
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If you have issues, read the full `README` **and** the [documentation][documentation::web] **for your version** (default is `edge`) first **before opening an issue**. The issue tracker is for issues, not for personal support.
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1. [Included Services](#included-services)
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2. [Issues and Contributing](./CONTRIBUTING.md)
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@ -17,7 +19,8 @@ A fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.)
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4. [Usage](#usage)
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5. [Examples](#examples)
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6. [Environment Variables](./ENVIRONMENT.md)
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7. [Release Notes](./CHANGELOG.md)
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7. [Documentation][documentation::web]
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8. [Release Notes](./CHANGELOG.md)
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## Included Services
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@ -59,7 +62,8 @@ A fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.)
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### Available image sources / tags
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The [CI/CD workflows](https://github.com/docker-mailserver/docker-mailserver/actions) automatically build, test and push new images to container registries. Currently, the following registries are supported:
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[CI/CD](https://github.com/docker-mailserver/docker-mailserver/actions) will automatically build, test and push new images to container registries. Currently, the following registries are supported:
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- [DockerHub](https://hub.docker.com/repository/docker/mailserver/docker-mailserver)
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- [GitHub Container Registry](https://github.com/orgs/docker-mailserver/packages?repo_name=docker-mailserver)
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@ -69,8 +73,7 @@ All workflows are using the **tagging convention** listed below. It is subsequen
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|--------------|-----------------------|------------|-------------------------------|
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| `push` | `refs/heads/master` | `cf20257` | `edge` |
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| `push` | `refs/heads/stable` | `cf20257` | `stable` |
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| `push tag` | `refs/tags/1.2.3` | `ad132f5` | `1.2.3`, `1.2`, `1`, `latest` |
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| `push tag` | `refs/tags/v1.2.3` | `ad132f5` | `1.2.3`, `1.2`, `1`, `latest` |
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| `push tag` | `refs/tags/[v]1.2.3` | `ad132f5` | `1.2.3`, `1.2`, `1`, `latest` |
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### Get the tools
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@ -117,15 +120,10 @@ If you'd like to use SELinux, add `-Z` to the variable `SELINUX_LABEL` in `.env`
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``` BASH
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docker-compose up -d mailserver
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# without SELinux
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./setup.sh email add <user@domain> [<password>]
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./setup.sh alias add postmaster@<domain> <user@domain>
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./setup.sh config dkim
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# with SELinux
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./setup.sh -Z email add <user@domain> [<password>]
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./setup.sh -Z alias add postmaster@<domain> <user@domain>
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./setup.sh -Z config dkim
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# for SELinux, use -Z
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./setup.sh [-Z] email add <user@domain> [<password>]
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./setup.sh [-Z] alias add postmaster@<domain> <user@domain>
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./setup.sh [-Z] config dkim
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```
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If you're seeing error messages about unchecked error, please **verify that you're using the right version of `setup.sh`**. Refer to the [Get the tools](#get-the-tools) section and / or execute `./setup.sh help` and read the `VERSION` section.
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@ -142,45 +140,11 @@ If you want to see detailed usage information, run `./setup.sh config dkim help`
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#### DNS - DKIM
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When keys are generated, you can configure your DNS server by just pasting the content of `config/opendkim/keys/domain.tld/mail.txt` to [set up DKIM](https://mxtoolbox.com/dmarc/dkim/setup/how-to-setup-dkim).
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When keys are generated, you can configure your DNS server by just pasting the content of `config/opendkim/keys/domain.tld/mail.txt` to [set up DKIM](https://mxtoolbox.com/dmarc/dkim/setup/how-to-setup-dkim). See the [documentation](https://docker-mailserver.github.io/docker-mailserver/edge/config/best-practices/dkim/) for more details.
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#### Custom user changes & patches
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If you'd like to change, patch or alter files or behavior of `docker-mailserver`, you can use a script. Just place it the `config/` folder that is created on startup and call it `user-patches.sh`. The setup is done like this:
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``` BASH
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# 1. Either create the config/ directory yourself
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# or let docker-mailserver create it on initial
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# startup
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/where/docker-mailserver/resides/ $ mkdir config && cd config
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# 2. Create the user-patches.sh script and make it
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# executable
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/where/docker-mailserver/resides/config/ $ touch user-patches.sh
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/where/docker-mailserver/resides/config/ $ chmod +x user-patches.sh
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# 3. Edit it
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/where/docker-mailserver/resides/config/ $ vi user-patches.sh
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/where/docker-mailserver/resides/config/ $ cat user-patches.sh
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#! /bin/bash
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# ! THIS IS AN EXAMPLE !
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# If you modify any supervisord configuration, make sure
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# to run `supervisorctl update` and/or `supervisorctl reload` afterwards.
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# shellcheck source=/dev/null
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. /usr/local/bin/helper-functions.sh
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_notify 'Applying user-patches'
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if ! grep -q '192.168.0.1' /etc/hosts
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then
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echo -e '192.168.0.1 some.domain.com' >> /etc/hosts
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fi
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```
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And you're done. The user patches script runs right before starting daemons. That means, all the other configuration is in place, so the script can make final adjustments.
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If you'd like to change, patch or alter files or behavior of `docker-mailserver`, you can use a script. See the [documentation](https://docker-mailserver.github.io/docker-mailserver/edge/config/advanced/user-patches/) for a detailed explanation.
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#### Supported Operating Systems
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@ -210,20 +174,9 @@ You're done! And don't forget to have a look at the remaining functions of the `
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If you got any problems with SPF and/or forwarding mails, give [SRS](https://github.com/roehling/postsrsd/blob/master/README.md) a try. You enable SRS by setting `ENABLE_SRS=1`. See the variable description for further information.
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#### Exposed ports
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#### Ports
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| Protocol | Opt-in Encryption ¹ | Enforced Encryption | Purpose |
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| :------: | :----------------------: | :-----------------: | :------------: |
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| SMTP | 25 | N/A | Transfer² |
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| ESMTP | 587 | 465³ | Submission |
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| POP3 | 110 | 995 | Retrieval |
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| IMAP4 | 143 | 993 | Retrieval |
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1. A connection *may* be secured over TLS when both ends support `STARTTLS`. On ports 110, 143 and 587, `docker-mailserver` will reject a connection that cannot be secured. Port 25 is [required](https://serverfault.com/questions/623692/is-it-still-wrong-to-require-starttls-on-incoming-smtp-messages) to support insecure connections.
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2. Receives email and filters for spam and viruses. For submitting outgoing mail you should prefer the submission ports(465, 587), which require authentication. Unless a relay host is configured, outgoing email will leave the server via port 25(thus outbound traffic must not be blocked by your provider or firewall).
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3. A submission port since 2018, [RFC 8314](https://tools.ietf.org/html/rfc8314). Originally a secure variant of port 25.
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See the [documentation](https://docker-mailserver.github.io/docker-mailserver/edge/config/security/understanding-the-ports/) for further details and best practice advice, especially regarding security concerns.
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See the [documentation](https://docker-mailserver.github.io/docker-mailserver/edge/config/security/understanding-the-ports/) for further details and best practice advice, **especially regarding security concerns**.
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## Examples
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@ -0,0 +1,43 @@
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---
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title: 'Custom User Changes & Patches | Scripting'
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---
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If you'd like to change, patch or alter files or behavior of `docker-mailserver`, you can use a script.
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In case you cloned this repository, you can copy the file `user-patches.sh.dist` under `config/` with `#!sh cp config/user-patches.sh.dist config/user-patches.sh` in order to create the `user-patches.sh` script. In case you are managing your directory structure yourself, create a `config/` directory and the `user-patches.sh` file yourself.
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``` sh
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# 1. Either create the config/ directory yourself
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# or let docker-mailserver create it on initial
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# startup
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~/somewhere $ mkdir config && cd config
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# 2. Create the user-patches.sh and edit it
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~/somewhere/config $ touch user-patches.sh
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~/somewhere/config $ vi user-patches.sh
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```
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The contents could look like this
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``` sh
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#! /bin/bash
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sed -i -E 's|(log_level).*|\1 = -1;|g' /etc/amavis/conf.d/49-docker-mailserver
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cat >/etc/amavis/conf.d/50-user << "END"
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use strict;
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$undecipherable_subject_tag = undef;
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$admin_maps_by_ccat{+CC_UNCHECKED} = undef;
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#------------ Do not modify anything below this line -------------
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1; # ensure a defined return
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END
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...
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```
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And you're done. The user patches script runs right before starting daemons. That means, all the other configuration is in place, so the script can make final adjustments.
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!!! note
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Many "patches" can already be done with the Docker Compose-/Stack-file. Adding hostnames to `/etc/hosts` is done with the `#!yaml extra_hosts:` section, `sysctl` commands can be managed with the `#!yaml sysctls:` section, etc.
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@ -18,6 +18,9 @@ This documentation provides you with advanced configuration, detailed examples,
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!!! tip
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See the [FAQ][docs-faq] for some more tips!
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!!! important
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If you'd like to change, patch or alter files or behavior of `docker-mailserver`, you can use a script. Just place it in the `config/` folder that is created on startup and call it `user-patches.sh`. If you'd like to see the full documentation and an example, visit the ['Modifications via Script' page][docs-userpatches].
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## Contributing
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We are always happy to welcome new contributors. For guidelines and entrypoints please have a look at the [Contributing section][docs-contributing].
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[docs-faq]: ./faq.md
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[docs-optionalconfig]: ./config/advanced/optional-config.md
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[docs-setupsh]: ./config/setup.sh.md
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[docs-userpatches]: ./config/advanced/override-defaults/user-patches.md
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[github-file-readme]: https://github.com/docker-mailserver/docker-mailserver/blob/master/README.md
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[github-file-env]: https://github.com/docker-mailserver/docker-mailserver/blob/master/ENVIRONMENT.md
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[github-file-setupsh]: https://github.com/docker-mailserver/docker-mailserver/blob/master/setup.sh
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@ -55,6 +55,7 @@ markdown_extensions:
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- pymdownx.details
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- pymdownx.superfences
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- pymdownx.magiclink
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- pymdownx.inlinehilite
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- pymdownx.emoji:
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emoji_index: !!python/name:materialx.emoji.twemoji
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emoji_generator: !!python/name:materialx.emoji.to_svg
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@ -109,6 +110,7 @@ nav:
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- 'Override the Default Configs':
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- 'Dovecot': config/advanced/override-defaults/dovecot.md
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- 'Postfix': config/advanced/override-defaults/postfix.md
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- 'Modifications via Script': config/advanced/override-defaults/user-patches.md
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- 'LDAP Authentication': config/advanced/auth-ldap.md
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- 'Email Filtering with Sieve': config/advanced/mail-sieve.md
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- 'Email Gathering with Fetchmail': config/advanced/mail-fetchmail.md
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