docs: update FAQ entries (docker-mailserver#3294)

* removed FAQ entry about Rancher, see <docker-mailserver#3289 (comment)>
* update FAQ about special directories, see <docker-mailserver#3289 (comment)>

Author: georglauterbach

docs/content/config/advanced/optional-config.md

@@ -4,7 +4,7 @@ hide:
   - toc # Hide Table of Contents for this page
 ---
 
-This is a list of all configuration files and directories which are optional or automatically generated in your `docker-data/dms/config/` directory. We use this path to reference the local config directory in our docs, which you should attach a volume into the container at `/tmp/docker-mailserver`.
+This is a list of all configuration files and directories which are optional or automatically generated in your [`docker-data/dms/config/`][docs-dms-config-volume] directory.
 
 ## Directories
 
@@ -42,6 +42,7 @@ This is a list of all configuration files and directories which are optional or
 - **user-patches.sh:** this file will be run after all configuration files are set up, but before the postfix, amavis and other daemons are started. (Docs: [FAQ - How to adjust settings with the `user-patches.sh` script][docs-faq-userpatches])
 - **rspamd/custom-commands.conf:** list of simple commands to adjust Rspamd modules in an easy way (Docs: [Rspamd][docs-rspamd-commands])
 
+[docs-dms-config-volume]: ../../faq.md#what-about-the-docker-datadmsconfig-directory
 [docs-accounts-quota]: ../../config/user-management.md#quotas
 [docs-aliases-regex]: ../../config/user-management.md#configuring-regexp-aliases
 [docs-dkim]: ../../config/best-practices/dkim_dmarc_spf.md#dkim

docs/content/faq.md

@@ -10,10 +10,6 @@ None! No database is required. The filesystem is the database. This image is bas
 
 Mails are stored in `/var/mail/${domain}/${username}`. Since `v9.0.0` it is possible to add custom `user_attributes` for each accounts to have a different mailbox configuration (See [#1792][github-issue-1792]).
 
-### What About the `docker-data/dms/config/` Directory?
-
-This documentation and all example configuration files in the GitHub repository use `docker-data/dms/config/` to refer to the directory in the host that is mounted (e.g. via a bind mount) to `/tmp/docker-mailserver/` inside the container,.
-
 ### How are IMAP mailboxes (_aka IMAP Folders_) set up?
 
 `INBOX` is setup by default with the special IMAP folders `Drafts`, `Sent`, `Junk` and `Trash`. You can learn how to modify or add your own folders (_including additional special folders like `Archive`_) by visiting our docs page [_Customizing IMAP Folders_](../examples/use-cases/imap-folders) for more information.
@@ -130,15 +126,6 @@ docker run --rm -it \
 find "${PWD}/docker-data/dms-backups/" -type f -mtime +30 -delete
 ```
 
-### What about the `./docker-data/dms/mail-state` folder?
-
-When you run DMS with the ENV variable `ONE_DIR=1` (default), this folder will:
-
-- Provide support to persist Fail2Ban blocks, ClamAV signature updates, and the like when the container is restarted or recreated.
-- To persist that container state properly this folder should be **volume mounted to `/var/mail-state/` internally**.
-
-Service data is [relocated to the `mail-state` folder][mail-state-folders] for the following services: Postfix, Dovecot, Fail2Ban, Amavis, PostGrey, ClamAV, SpamAssassin.
-
 ### I Want to Know More About the Ports
 
 See [this part of the documentation](../config/security/understanding-the-ports/) for further details and best practice advice, **especially regarding security concerns**.
@@ -237,14 +224,6 @@ If everything is OK regarding DNS, please provide [formatted logs](https://guide
 
 If we're blind, we won't be able to do anything.
 
-### Can DMS run in a Rancher environment?
-
-Yes, by adding the environment variable `PERMIT_DOCKER: network`.
-
-!!! warning
-
-    Adding the Docker network's gateway to the list of trusted hosts, e.g. using the `network` or `connected-networks` option, can create an [**open relay**](https://en.wikipedia.org/wiki/Open_mail_relay), for instance [if IPv6 is enabled on the host machine but not in Docker][github-issue-1405-comment].
-
 ### Connection refused or No response at all
 
 You see errors like "Connection Refused" and "Connection closed by foreign host", or you cannot connect at all? You may not be able to connect with your mail client (MUA)? Make sure to check Fail2Ban did not ban you (for exceeding the number of tried logins for example)! You can run
@@ -373,6 +352,20 @@ DMS does not manage those concerns, verify they are not causing your delivery pr
 - [mail-tester](https://www.mail-tester.com/) can test your deliverability.
 - [helloinbox](https://www.helloinbox.email/) provides a checklist of things to improve your deliverability.
 
+### Special Directories
+
+#### What About the `docker-data/dms/config/` Directory?
+
+This documentation and all example configuration files in the GitHub repository use `docker-data/dms/config/` to refer to the directory in the host that is mounted (e.g. via a bind mount) to `/tmp/docker-mailserver/` inside the container.
+
+Most configuration files for Postfix, Dovecot, etc. are persisted here. [Optional configuration][docs-optional-configuration] is stored here as well.
+
+#### What About the `docker-data/dms/mail-state/` Directory?
+
+This documentation and all example configuration files in the GitHub repository use `docker-data/dms/mail-state/` to refer to the directory in the host that is mounted (e.g. via a bind mount) to `/var/mail-state/` inside the container.
+
+When you run DMS with the ENV variable `ONE_DIR=1` (default), this directory will provide support to persist Fail2Ban blocks, ClamAV signature updates, and the like when the container is restarted or recreated. Service data is [relocated to the `mail-state` folder][mail-state-folders] for the following services: Postfix, Dovecot, Fail2Ban, Amavis, PostGrey, ClamAV, SpamAssassin, Rspamd & Redis.
+
 ### SpamAssasin
 
 #### How can I manage my custom SpamAssassin rules?
@@ -539,3 +532,4 @@ $spam_quarantine_to       = "amavis\@example.com";
 [github-issue-1792]: https://github.com/docker-mailserver/docker-mailserver/pull/1792
 [hanscees-userpatches]: https://github.com/hanscees/dockerscripts/blob/master/scripts/tomav-user-patches.sh
 [mail-state-folders]: https://github.com/docker-mailserver/docker-mailserver/blob/c7e498194546416fb7231cb03254e77e085d18df/target/scripts/startup/misc-stack.sh#L24-L33
+[docs-optional-configuration]: ./config/advanced/optional-config.md