All notable changes to this project will be documented in this file. The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
- Revised testing of service process management (supervisord) to be more robust ([#3780](https://github.com/docker-mailserver/docker-mailserver/pull/3780))
- Postfix is now configured with `smtputf8_enable = no` in our default `main.cf` config (_instead of during container startup_). ([#3750](https://github.com/docker-mailserver/docker-mailserver/pull/3750))
- symbol scores for SPF, DKIM & DMARC were updated to more closely align with [RFC7489](https://www.rfc-editor.org/rfc/rfc7489#page-24); please note though that complete alignment is undesirable, because other symbols might be added as well, which changes the overall score calculation again, see [this issue](https://github.com/docker-mailserver/docker-mailserver/issues/3690#issuecomment-1866871996)
- Revised the SpamAssassin ENV docs to better communicate configuration and their relation to other ENV settings. ([#3756](https://github.com/docker-mailserver/docker-mailserver/pull/3756))
- Detailed how mail received is assigned a spam score by Rspamd and processed accordingly ([#3773](https://github.com/docker-mailserver/docker-mailserver/pull/3773))
- During container startup for Dovecot Sieve, `.sievec` source files compiled to `.svbin` now have their `mtime` adjusted post setup to ensure it is always older than the associated `.svbin` file. This avoids superfluous error logs for sieve scripts that don't actually need to be compiled again ([#3779](https://github.com/docker-mailserver/docker-mailserver/pull/3779))
-`.gitattributes`: Always use LF line endings on checkout for files with shell script content ([#3755](https://github.com/docker-mailserver/docker-mailserver/pull/3755))
DMS is now secured against the [recently published spoofing attack "SMTP Smuggling"](https://www.postfix.org/smtp-smuggling.html) that affected Postfix ([#3727](https://github.com/docker-mailserver/docker-mailserver/pull/3727)):
- Postfix upgraded from `3.5.18` to `3.5.23` which provides the [long-term fix with `smtpd_forbid_bare_newline = yes`](https://www.postfix.org/smtp-smuggling.html#long)
- If you are unable to upgrade to this release of DMS, you may follow [these instructions](https://github.com/docker-mailserver/docker-mailserver/issues/3719#issuecomment-1870865118) for applying the [short-term workaround](https://www.postfix.org/smtp-smuggling.html#short).
- This change should not cause compatibility concerns for legitimate mail clients, however if you use software like `netcat` to send mail to DMS (_like our test-suite previously did_) it may now be rejected (_especially with the the short-term workaround `smtpd_data_restrictions = reject_unauth_pipelining`_).
- **NOTE:** This Postfix update also includes the new parameter [`smtpd_forbid_bare_newline_exclusions`](https://www.postfix.org/postconf.5.html#smtpd_forbid_bare_newline_exclusions) which defaults to `$mynetworks` for excluding trusted mail clients excluded from the restriction.
- With our default `PERMIT_DOCKER=none` this is not a concern.
- Presently the Docker daemon config has `user-proxy: true` enabled by default.
- On a host that can be reached by IPv6, this will route to a DMS IPv4 only container implicitly through the Docker network bridge gateway which rewrites the source address.
- If your `PERMIT_DOCKER` setting allows that gateway IP, then it is part of `$mynetworks` and this attack would not be prevented from such connections.
- If this affects your deployment, refer to [our IPv6 docs](https://docker-mailserver.github.io/docker-mailserver/v13.2/config/advanced/ipv6/) for advice on handling IPv6 correctly in Docker. Alternatively [use our `postfix-main.cf`](https://docker-mailserver.github.io/docker-mailserver/v13.2/config/advanced/override-defaults/postfix/) to set `smtpd_forbid_bare_newline_exclusions=` as empty.
- The test suite now uses `swaks` instead of `nc`, which has multiple benefits ([#3732](https://github.com/docker-mailserver/docker-mailserver/pull/3732)):
-`swaks` handles pipelining correctly, hence we can now use `reject_unauth_pipelining` in Postfix's configuration.
-`swaks` provides better CLI options that make many files superflous.
-`swaks` can also replace `openssl s_client` and handles authentication on submission ports better.
- We now defer rejection from unauthorized pipelining until the SMTP `DATA` command via `smtpd_data_restrictions` (_i.e. at the end of the mail transfer transaction_) ([#3744](https://github.com/docker-mailserver/docker-mailserver/pull/3744))
- Prevously our configuration only handled this during the client and recipient restriction stages. Postfix will flag this activity when encountered, but the rejection now is handled at `DATA` where unauthorized pipelining would have been valid from this point.
- If you had the Amavis service enabled (default), this restriction was already in place. Otherwise the concerns expressed with `smtpd_data_restrictions = reject_unauth_pipelining` from the security section above apply. We have permitted trusted clients (_`$mynetworks` or authenticated_) to bypass this restriction.
- You can now use `make run-local-instance` to run a DMS image that was built locally to test changes ([#3663](https://github.com/docker-mailserver/docker-mailserver/pull/3663))
- Log a warning when update-check is enabled, but no stable release image is used ([#3684](https://github.com/docker-mailserver/docker-mailserver/pull/3684))
- Debugging - Raise awareness in the troubleshooting page for a common misconfiguration when deviating from our advice by using a bare domain ([#3680](https://github.com/docker-mailserver/docker-mailserver/pull/3680))
- Debugging - Raise awareness of temporary downtime during certificate renewal that can cause a failure to deliver local mail ([#3718](https://github.com/docker-mailserver/docker-mailserver/pull/3718))
- Postfix configures `virtual_mailbox_maps` and `virtual_transport` during startup instead of using defaults (configured for Dovecot) via our `main.cf` ([#3681](https://github.com/docker-mailserver/docker-mailserver/pull/3681))
- Upgraded to version `3.7.5`. This was previously inconsistent between our AMD64 (`3.5`) and ARM64 (`3.4`) images ([#3686](https://github.com/docker-mailserver/docker-mailserver/pull/3686))
- The container startup welcome log message now references `DMS_RELEASE` ([#3676](https://github.com/docker-mailserver/docker-mailserver/pull/3676))
-`VERSION` was incremented for prior releases to be notified of the v13.0.1 patch release ([#3676](https://github.com/docker-mailserver/docker-mailserver/pull/3676))
- The `postgrey` service now writes logs to the supervisor directory like all other services. Previously this was `/var/log/mail/mail.log` ([#3724](https://github.com/docker-mailserver/docker-mailserver/pull/3724))
This patch release fixes two bugs that Rspamd users encountered with the `v13.0.0` release. Big thanks to the those that helped to identify these issues! ❤️
- The update check service now queries the latest GH release for a version tag (_instead of from a `VERSION` file at the GH repo_). This should provide more reliable update notifications ([#3666](https://github.com/docker-mailserver/docker-mailserver/pull/3666))
- The check for correct permission on the private key when signing e-mails with DKIM was flawed. The result was that a false warning was emitted ([#3669](https://github.com/docker-mailserver/docker-mailserver/pull/3669))
- When [`RSPAMD_CHECK_AUTHENTICATED=0`][docs::env-rspamd-check-auth], DKIM signing for outbound e-mail was disabled, which is undesirable ([#3669](https://github.com/docker-mailserver/docker-mailserver/pull/3669)). **Make sure to check the documentation of [`RSPAMD_CHECK_AUTHENTICATED`][docs::env-rspamd-check-auth]**!
- ENV `LDAP_SERVER_HOST`, `DOVECOT_URIS`, and `SASLAUTHD_LDAP_SERVER` will now log an error if the LDAP URI scheme is missing. Previously there was an implicit fallback to `ldap://` ([#3522](https://github.com/docker-mailserver/docker-mailserver/pull/3522))
-`ENABLE_LDAP=1` is no longer supported, please use `ACCOUNT_PROVISIONER=LDAP` ([#3507](https://github.com/docker-mailserver/docker-mailserver/pull/3507))
- **Rspamd:**
- The deprecated path for the Rspamd custom commands file (`/tmp/docker-mailserver/rspamd-modules.conf`) now prevents successful startup. The correct path is `/tmp/docker-mailserver/rspamd/custom-commands.conf`.
- **Dovecot:**
- Dovecot mail storage per account in `/var/mail` previously shared the same path for the accounts home directory ([#3335](https://github.com/docker-mailserver/docker-mailserver/pull/3335))
- The home directory now is a subdirectory `home/`. This change better supports sieve scripts.
- **NOTE:** The change has not yet been implemented for `ACCOUNT_PROVISIONER=LDAP`.
- **Postfix:**
-`/etc/postfix/master.cf` has renamed the "smtps" service to "submissions" ([#3235](https://github.com/docker-mailserver/docker-mailserver/pull/3235))
- This is the modern `/etc/services` name for port 465, aligning with the similar "submission" port 587.
- Postfix now defaults to supporting DSNs (_[Delivery Status Notifications](https://github.com/docker-mailserver/docker-mailserver/pull/3572#issuecomment-1751880574)_) only for authenticated users (_via ports 465 + 587_). This is a security measure to reduce spammer abuse of your DMS instance as a backscatter source. ([#3572](https://github.com/docker-mailserver/docker-mailserver/pull/3572))
- If you need to modify this change, please let us know by opening an issue / discussion.
- You can [opt out (_enable DSNs_) via the `postfix-main.cf` override support](https://docker-mailserver.github.io/docker-mailserver/v12.1/config/advanced/override-defaults/postfix/) using the contents: `smtpd_discard_ehlo_keywords =`.
- Likewise for authenticated users, the submission(s) ports (465 + 587) are configured internally via `master.cf` to keep DSNs enabled (_since authentication protects from abuse_).
-`getmail` as an alternative to `fetchmail` ([#2803](https://github.com/docker-mailserver/docker-mailserver/pull/2803))
-`setup` CLI - `setup fail2ban` gained a new `status <JAIL>` subcommand ([#3455](https://github.com/docker-mailserver/docker-mailserver/pull/3455))
- **Environment Variables:**
-`MARK_SPAM_AS_READ`. When set to `1`, marks incoming spam as "read" to avoid unwanted "new mail" notifications for junk mail ([#3489](https://github.com/docker-mailserver/docker-mailserver/pull/3489))
-`DMS_VMAIL_UID` and `DMS_VMAIL_GID` allow changing the default ID values (`5000:5000`) for the Dovecot vmail user and group ([#3550](https://github.com/docker-mailserver/docker-mailserver/pull/3550))
-`RSPAMD_CHECK_AUTHENTICATED` allows authenticated users to avoid additional security checks by Rspamd ([#3440](https://github.com/docker-mailserver/docker-mailserver/pull/3440))
- **Documentation:**
- Use-case examples / tutorials:
- iOS mail push support ([#3513](https://github.com/docker-mailserver/docker-mailserver/pull/3513))
- Guide for setting up Dovecot Authentication via Lua ([#3579](https://github.com/docker-mailserver/docker-mailserver/pull/3579))
- Guide for integrating with the Crowdsec service ([#3651](https://github.com/docker-mailserver/docker-mailserver/pull/3651))
- Debugging page:
- New compatibility section ([#3404](https://github.com/docker-mailserver/docker-mailserver/pull/3404))
- Now advises how to (re)start DMS correctly ([#3654](https://github.com/docker-mailserver/docker-mailserver/pull/3654))
- Better communicate distinction between DMS FQDN and DMS mail accounts ([#3372](https://github.com/docker-mailserver/docker-mailserver/pull/3372))
- Traefik example now includes `passthrough=true` on implicit ports ([#3568](https://github.com/docker-mailserver/docker-mailserver/pull/3568))
- Rspamd docs have received a variety of revisions ([#3318](https://github.com/docker-mailserver/docker-mailserver/pull/3318), [#3325](https://github.com/docker-mailserver/docker-mailserver/pull/3325), [#3329](https://github.com/docker-mailserver/docker-mailserver/pull/3329))
- IPv6 config examples with content tabs ([#3436](https://github.com/docker-mailserver/docker-mailserver/pull/3436))
- Mention [internet.nl](https://internet.nl/test-mail/) as another testing service ([#3445](https://github.com/docker-mailserver/docker-mailserver/pull/3445))
-`setup alias add ...` CLI help message now includes an example for aliasing to multiple recipients ([#3600](https://github.com/docker-mailserver/docker-mailserver/pull/3600))
-`SPAMASSASSIN_SPAM_TO_INBOX=1`, now emits a debug log to raise awareness that `SA_KILL` will be ignored ([#3360](https://github.com/docker-mailserver/docker-mailserver/pull/3360))
-`CLAMAV_MESSAGE_SIZE_LIMIT` now logs a warning when the value exceeds what ClamAV is capable of supporting (4GiB max scan size [#3332](https://github.com/docker-mailserver/docker-mailserver/pull/3332), 2GiB max file size [#3341](https://github.com/docker-mailserver/docker-mailserver/pull/3341))
- Added note to caution against changing `mydestination` in Postfix's `main.cf` ([#3316](https://github.com/docker-mailserver/docker-mailserver/pull/3316))
- **Internal:**
- Added a wrapper to update Postfix configuration safely ([#3484](https://github.com/docker-mailserver/docker-mailserver/pull/3484), [#3503](https://github.com/docker-mailserver/docker-mailserver/pull/3503))
- Add debug group to `packages.sh` ([#3578](https://github.com/docker-mailserver/docker-mailserver/pull/3578))
- **Tests:**
- Additional linting check for BASH syntax ([#3369](https://github.com/docker-mailserver/docker-mailserver/pull/3369))
- Dropped special bits from `maildrop/` and `public/` directory permissions ([#3625](https://github.com/docker-mailserver/docker-mailserver/pull/3625))
- **Rspamd:**
- Adjusted learning of ham ([#3334](https://github.com/docker-mailserver/docker-mailserver/pull/3334))
- Removed the symlink for the `override.d/` directory in favor of using `cp`, integrated into the changedetector service, added a `--force` option for the Rspamd DKIM management, and provided a dedicated helper script for common ENV variables ([#3599](https://github.com/docker-mailserver/docker-mailserver/pull/3599))
- Complete rewrite of the IPv6 page ([#3244](https://github.com/docker-mailserver/docker-mailserver/pull/3244), [#3531](https://github.com/docker-mailserver/docker-mailserver/pull/3531))
- Complete rewrite of the "Update and Cleanup" maintenance page ([#3539](https://github.com/docker-mailserver/docker-mailserver/pull/3539), [#3583](https://github.com/docker-mailserver/docker-mailserver/pull/3583))
- Improved debugging page advice on working with logs ([#3626](https://github.com/docker-mailserver/docker-mailserver/pull/3626), [#3640](https://github.com/docker-mailserver/docker-mailserver/pull/3640))
- Clarified the default for ENV `FETCHMAIL_PARALLEL` ([#3603](https://github.com/docker-mailserver/docker-mailserver/pull/3603))
- Removed port 25 from FAQ entry for mail client ports supporting authenticated submission ([#3496](https://github.com/docker-mailserver/docker-mailserver/pull/3496))
- Updated home path in docs for Dovecot Sieve ([#3370](https://github.com/docker-mailserver/docker-mailserver/pull/3370), [#3650](https://github.com/docker-mailserver/docker-mailserver/pull/3650))
- Fixed path to `rspamd.log` ([#3585](https://github.com/docker-mailserver/docker-mailserver/pull/3585))
- "Optional Config" page now uses consistent lowercase convention for directory names ([#3629](https://github.com/docker-mailserver/docker-mailserver/pull/3629))
-`CONTRIBUTORS.md`: Removed redundant "All Contributors" section ([#3638](https://github.com/docker-mailserver/docker-mailserver/pull/3638))
- Clarified that the issue tracker is not for personal support ([#3498](https://github.com/docker-mailserver/docker-mailserver/pull/3498), [#3502](https://github.com/docker-mailserver/docker-mailserver/pull/3502))
- Bumped versions of miscellaneous software (also shoutout to @dependabot) ([#3371](https://github.com/docker-mailserver/docker-mailserver/pull/3371), [#3584](https://github.com/docker-mailserver/docker-mailserver/pull/3584), [#3504](https://github.com/docker-mailserver/docker-mailserver/pull/3504), [#3516](https://github.com/docker-mailserver/docker-mailserver/pull/3516))
- **Tests:**
- Refactored LDAP tests to current conventions ([#3483](https://github.com/docker-mailserver/docker-mailserver/pull/3483))
- Changed OpenLDAP image to `bitnami/openldap` ([#3494](https://github.com/docker-mailserver/docker-mailserver/pull/3494))
- Added tests for the helper function `_add_to_or_update_postfix_main()` ([#3505](https://github.com/docker-mailserver/docker-mailserver/pull/3505))
- EditorConfig Checker lint now uses a mount path to `/check` instead of `/ci` ([#3655](https://github.com/docker-mailserver/docker-mailserver/pull/3655))
### Fixed
- **Security:**
- Fixed issue with concatenating `$dmarc_milter` and `$dkim_milter` in `main.cf` ([#3380](https://github.com/docker-mailserver/docker-mailserver/pull/3380))
- Fixed Rspamd DKIM signing for inbound emails ([#3439](https://github.com/docker-mailserver/docker-mailserver/pull/3439), [#3453](https://github.com/docker-mailserver/docker-mailserver/pull/3453))
- OpenDKIM key generation is no longer broken when Rspamd is also enabled ([#3535](https://github.com/docker-mailserver/docker-mailserver/pull/3535))
- **Internal:**
- The "database" files (_for managing users and aliases_) now correctly filters within lookup query ([#3359](https://github.com/docker-mailserver/docker-mailserver/pull/3359))
-`_setup_spam_to_junk()` no longer registered when `SMTP_ONLY=1` ([#3385](https://github.com/docker-mailserver/docker-mailserver/pull/3385))
- Dovecot `fts_xapian` is now compiled from source to match the Dovecot package ABI ([#3373](https://github.com/docker-mailserver/docker-mailserver/pull/3373))
- **CI:**
- Scheduled build now have the correct permissions to run successfully ([#3345](https://github.com/docker-mailserver/docker-mailserver/pull/3345))
- made config more aggressive ([#3243](https://github.com/docker-mailserver/docker-mailserver/pull/3243) & [#3288](https://github.com/docker-mailserver/docker-mailserver/pull/3288))
- update fail2ban config examples with current DMS default values ([#3258](https://github.com/docker-mailserver/docker-mailserver/pull/3258))
- make Fail2Ban log persistent ([#3269](https://github.com/docker-mailserver/docker-mailserver/pull/3269))
- update F2B docs & bind mount links ([#3293](https://github.com/docker-mailserver/docker-mailserver/pull/3293))
- The value of `smtpd_sender_restrictions` for Postfix has replaced the value ([#3127](https://github.com/docker-mailserver/docker-mailserver/pull/3127)):
- In `main.cf` with `$dms_smtpd_sender_restrictions`
- In `master.cf` inbound submissions ports 465 + 587 extend this inherited `smtpd` restriction with `$mua_sender_restrictions`
### Added
- **security**: Rspamd support:
- integration into scripts, provisioning of configuration & documentation ([#2902](https://github.com/docker-mailserver/docker-mailserver/pull/2902),[#3016](https://github.com/docker-mailserver/docker-mailserver/pull/3016),[#3039](https://github.com/docker-mailserver/docker-mailserver/pull/3039))
- make disabling Redis possible ([#3132](https://github.com/docker-mailserver/docker-mailserver/pull/3132))
- persistence for Redis ([#3143](https://github.com/docker-mailserver/docker-mailserver/pull/3143))
- integrate into `MOVE_SPAM_TO_JUNK` ([#3159](https://github.com/docker-mailserver/docker-mailserver/pull/3159))
- make it possible to learn from user actions ([#3159](https://github.com/docker-mailserver/docker-mailserver/pull/3159))
- heavily updated CI & tests:
- added functionality to send mail with a helper function ([#3026](https://github.com/docker-mailserver/docker-mailserver/pull/3026),[#3103](https://github.com/docker-mailserver/docker-mailserver/pull/3103),[#3105](https://github.com/docker-mailserver/docker-mailserver/pull/3105))
- add a dedicated page for tests with more information ([#3019](https://github.com/docker-mailserver/docker-mailserver/pull/3019))
- add information to Logwatch's mailer so `Envelope From` is properly set ([#3081](https://github.com/docker-mailserver/docker-mailserver/pull/3081))
- Add tools (ping & dig) to the image ([2989](https://github.com/docker-mailserver/docker-mailserver/pull/2989))
### Updates
- Fail2Ban major version updated to v1.0.2 ([#2959](https://github.com/docker-mailserver/docker-mailserver/pull/2959))
- heavily updated CI & tests:
- we now run more tests in parallel bringing down overall time to build and test AMD64 to 6 minutes ([#2938](https://github.com/docker-mailserver/docker-mailserver/pull/2938),[#3038](https://github.com/docker-mailserver/docker-mailserver/pull/3038),[#3018](https://github.com/docker-mailserver/docker-mailserver/pull/3018),[#3062](https://github.com/docker-mailserver/docker-mailserver/pull/3062))
- remove CI ENV & disable fail-fast strategy ([#3065](https://github.com/docker-mailserver/docker-mailserver/pull/3065))
- correct the casing for Mime vs. MIME ([#3040](https://github.com/docker-mailserver/docker-mailserver/pull/3040))
- Dovecot:
- Quota plugin is now properly configured via `mail_plugins` at setup ([#2958](https://github.com/docker-mailserver/docker-mailserver/pull/2958))
-`quota-status` service (port 65265) now only binds to `127.0.0.1` ([#3057](https://github.com/docker-mailserver/docker-mailserver/pull/3057))
- OpenDMARC - Change default policy to reject ([#2933](https://github.com/docker-mailserver/docker-mailserver/pull/2933))
- Change Detection service - Use service `reload` instead of restarting process to minimize downtime ([#2947](https://github.com/docker-mailserver/docker-mailserver/pull/2947))
- Slightly faster container startup via `postconf` workaround ([#2998](https://github.com/docker-mailserver/docker-mailserver/pull/2998))
- Better group ownership to `/var/mail-state` + ClamAV in `Dockerfile` ([#3011](https://github.com/docker-mailserver/docker-mailserver/pull/3011))
- Dropping Postfix `chroot` mode:
- Remove syslog socket created by Debian ([#3134](https://github.com/docker-mailserver/docker-mailserver/pull/3134))
- Supervisor proxy signals for `postfix start-fg` via PID ([#3118](https://github.com/docker-mailserver/docker-mailserver/pull/3118))
- Fixed several typos ([#2990](https://github.com/docker-mailserver/docker-mailserver/pull/2990)) ([#2993](https://github.com/docker-mailserver/docker-mailserver/pull/2993))
- **build**: Fix dovecot-fts-xapian dependency, when using dovecot community repository ([#2937](https://github.com/docker-mailserver/docker-mailserver/pull/2937))
- **config**: `opendmarc.conf` - Change the default OpenDMARC policy to reject ([#2933](https://github.com/docker-mailserver/docker-mailserver/pull/2933))
### Deprecation Notice
- **Removing TLS 1.0 and TLS 1.1 ciphersuites from `TLS_LEVEL=intermediate`**
You should not realistically need support for TLS 1.0 or TLS 1.1, except in niche scenarios such as an old printer/scanner device that refuses to negotiate a compatible non-vulnerable cipher. [More details covered here](https://github.com/docker-mailserver/docker-mailserver/issues/2679).
- **`SASL_PASSWD` ENV**
An old ENV `SASL_PASSWD` has been around for supporting relay-host authentication, but since superceded by the `postfix-sasl-password.cf` config file. It will be removed in a future major release as detailed [here](https://github.com/docker-mailserver/docker-mailserver/pull/2605).
- **Platform Support - ARMv7**
This is a very old platform, superceded by ARMv8 and newer with broad product availability around 2016 onwards.
Support was introduced primarily for users of the older generations of Raspberry Pi. ARM64 is the modern target for ARM devices.
If you require ARMv7 support, [please let us know](https://github.com/docker-mailserver/docker-mailserver/issues/2642).
This release features a lot of small and medium-sized changes, many related to how the image is build and tested during CI. The build now multi-stage based and requires Docker Buildkit, as the ClamAV Signatures are added via `COPY --link ...` during build-time.
### Deprecated
- The environment variable `ENABLE_LDAP` is deprecated and will be removed in [13.0.0]. Use `ACCOUNT_PROVISIONER=LDAP` now.
In this release the relay-host support saw [significant internal refactoring](https://github.com/docker-mailserver/docker-mailserver/pull/2604) in preparation for a future breaking change. Similar extensive restructuring through the codebase also occurred, where [each PR provides more details](https://github.com/docker-mailserver/docker-mailserver/milestone/17?closed=1). Care was taken to avoid breakage, but there may be some risk affecting unsupported third-party customizations which our test suite is unaware of.
- There is now support for [Dovecot-Master accounts](https://docker-mailserver.github.io/docker-mailserver/v11.1/config/advanced/dovecot-master-accounts/) that provide admin access to all mail accounts ([#2535](https://github.com/docker-mailserver/docker-mailserver/pull/2535))
- Using Port 465 to authenticate with a relay-host no longer breaks the Amavis transport for Postfix ([#2607](https://github.com/docker-mailserver/docker-mailserver/pull/2607))
- When mounting `/var/mail-state`, disabled services will no longer copy over data redundantly ([#2608](https://github.com/docker-mailserver/docker-mailserver/pull/2608))
- Amavis is now aware of new domains detected during Change Detection, no longer skipping virus and spam filtering ([#2616](https://github.com/docker-mailserver/docker-mailserver/pull/2616))
-`setup.sh -c <container name>` no longer ignores `<container name>` when more than 1 `docker-mailserver` container is running ([#2622](https://github.com/docker-mailserver/docker-mailserver/pull/2622))
### Improvements
- The Change Detector service will now only process relevant changes ([#2615](https://github.com/docker-mailserver/docker-mailserver/pull/2615)), in addition to now monitoring `postfix-sasl-password.cf`, `postfix-relaymap.cf`, and `postfix-regexp.cf` ([#2623](https://github.com/docker-mailserver/docker-mailserver/pull/2623))
- For LDAP users that only need to support a single mail domain, `setup config dkim` should now detect the domain implicitly ([#2620](https://github.com/docker-mailserver/docker-mailserver/pull/2620))
- The container capability `SYS_PTRACE` is no longer necessary ([#2624](https://github.com/docker-mailserver/docker-mailserver/pull/2624))
- Added an example for configuring a basic container `healthcheck` command ([#2625](https://github.com/docker-mailserver/docker-mailserver/pull/2625))
- Postfix `main.cf` setting `compatibility_level` was set to `2` during our startup scripts. This is now part of our default shipped `main.cf` config ([#2597](https://github.com/docker-mailserver/docker-mailserver/pull/2597))
- The Postfix `main.cf` override/extension support via `postfix-main.cf` has been improved to support multi-line values, instead of the previous single-line only support ([#2598](https://github.com/docker-mailserver/docker-mailserver/pull/2598))
### Deprecation Notice
- **`SASL_PASSWD` ENV**
An old ENV `SASL_PASSWD` has been around for supporting relay-host authentication, but since superceded by the `postfix-sasl-password.cf` config file. It will be removed in a future major release as detailed [here](https://github.com/docker-mailserver/docker-mailserver/pull/2605).
- **Platform Support - ARMv7**
This is a very old platform, superceded by ARMv8 and newer with broad product availability around 2016 onwards.
Support was introduced primarily for users the older generations of Raspberry Pi. ARM64 is the modern target for ARM devices.
1. [**Internal logging has been refactored**](https://github.com/docker-mailserver/docker-mailserver/pull/2493). The environment variable `DMS_DEBUG` has been replaced by [`LOG_LEVEL`](https://docker-mailserver.github.io/docker-mailserver/v11.0/config/environment/#log_level) to better control the verbosity of logs we output. The new logger is more structured and follows standard log conventions. `LOG_LEVEL` can be set to: `error`, `warn`, `info` (default), `debug` and `trace`.
2. [**`iptables` has been replaced by `nftables`**](https://github.com/docker-mailserver/docker-mailserver/pull/2505). The Fail2Ban configuration was adjusted accordingly. If you use `iptables` yourself (e.g. in `user-patches.sh`), make sure to update the scripts.
3.**[`PERMIT_DOCKER`](https://docker-mailserver.github.io/docker-mailserver/v11.0/config/environment/#permit_docker) has a new default value of `none`**. This change [better secures Podman](https://github.com/docker-mailserver/docker-mailserver/pull/2424); to keep the old behaviour (_adding the container IP address to Postfix's `mynetworks`_), use `PERMIT_DOCKER=container`.
### Minor Changes
1.**Many** minor improvements were made (cleanup & refactoring). Please refer to the section below to get an overview over all improvements. Moreover, there was a lot of cleanup in the scripts and in the tests. The documentation was adjusted accordingly.
3. SpamAssassin KAM was added with [`ENABLE_SPAMASSASSIN_KAM`](https://docker-mailserver.github.io/docker-mailserver/v11.0/config/environment/#enable_spamassassin_kam).
4. The `fail2ban` command was reworked and can now ban IP addresses as well.
5. There were a few small fixes, especially when it comes to bugs in scripts and service restart loops (no functionality changes, only fixes of existing functionality). When building an image from the Dockerfile - Installation of Postfix on modern Linux distributions should now always succeed.
6. Some default values for environment values changed: these are mostly non-critical, please refer to [#2428](https://github.com/docker-mailserver/docker-mailserver/pull/2428) and [#2487](https://github.com/docker-mailserver/docker-mailserver/pull/2487).
- **[improvement]** Remove macOS specific code / support + shellcheck should avoid python, regardless of permissions [#2466](https://github.com/docker-mailserver/docker-mailserver/pull/2466)
- **[feature]** firewall: replace `iptables` with `nftables` [#2505](https://github.com/docker-mailserver/docker-mailserver/pull/2505)
- **[improvement]** log: adjust level and message(s) slightly for four messages [#2532](https://github.com/docker-mailserver/docker-mailserver/pull/2532)
- **[improvement]** log: introduce proper log level fallback and env getter function [#2506](https://github.com/docker-mailserver/docker-mailserver/pull/2506)
- **[feature]** scripts: added `TZ` environment variable to set timezone [#2530](https://github.com/docker-mailserver/docker-mailserver/pull/2530)
- **[improvement]** setup: added grace period for account creation [#2531](https://github.com/docker-mailserver/docker-mailserver/pull/2531)
1. This release fixes a critical issue for LDAP users, installing a needed package on Debian 11 on build-time. Moreover, a race-condition was eliminated ([#2341](https://github.com/docker-mailserver/docker-mailserver/pull/2341)).
2. A resource leak in `check-for-changes.sh` was fixed ([#2401](https://github.com/docker-mailserver/docker-mailserver/pull/2401))
### Other Minor Changes
1.`SPAMASSASSIN_SPAM_TO_INBOX`'s default changed to `1`. ([#2361](https://github.com/docker-mailserver/docker-mailserver/pull/2361))
2. Changedetector functionality was added to `SSL_TYPE=manual`-setups. ([#2404](https://github.com/docker-mailserver/docker-mailserver/pull/2404))
3. Four new environment variables were introduced: `LOGWATCH_SENDER`, `ENABLE_DNSBL`, `DOVECOT_INET_PROTOCOLS` and `ENABLE_SPAMASSASSIN_KAM`. ([#2362](https://github.com/docker-mailserver/docker-mailserver/pull/2362), [#2342](https://github.com/docker-mailserver/docker-mailserver/pull/2342), [#2358](https://github.com/docker-mailserver/docker-mailserver/pull/2358), [#2418](https://github.com/docker-mailserver/docker-mailserver/pull/2418))
4. There are plenty of bug fixes and documentation enhancements with this release.
### Merged Pull Requests
- **[fix]** added `libldap-common` to packages in Dockerfile in [#2341](https://github.com/docker-mailserver/docker-mailserver/pull/2341)
- **[fix]** Prevent race condition on supervisorctl reload in [#2343](https://github.com/docker-mailserver/docker-mailserver/pull/2343)
- **[docs]** Update links to dovecot docs in [#2351](https://github.com/docker-mailserver/docker-mailserver/pull/2351)
- **[fix]** tests(fix): Align with upstream `testssl` field name change in [#2353](https://github.com/docker-mailserver/docker-mailserver/pull/2353)
- **[improvement]** Make TLS tests more reliable in [#2354](https://github.com/docker-mailserver/docker-mailserver/pull/2354)
- **[feature]** Introduce ENABLE_DNSBL env in [#2342](https://github.com/docker-mailserver/docker-mailserver/pull/2342)
- **[feature]** Introduce DOVECOT_INET_PROTOCOLS env in [#2358](https://github.com/docker-mailserver/docker-mailserver/pull/2358)
- **[fix]** Fix harmless startup errors in [#2357](https://github.com/docker-mailserver/docker-mailserver/pull/2357)
- **[improvement]** Add tests for sedfile wrapper in [#2363](https://github.com/docker-mailserver/docker-mailserver/pull/2363)
- **[feature]** add env var `LOGWATCH_SENDER` in [#2362](https://github.com/docker-mailserver/docker-mailserver/pull/2362)
- **[fix]** Fixed non-number-argument in `listmailuser` in [#2382](https://github.com/docker-mailserver/docker-mailserver/pull/2382)
- **[fix]** docs: Fail2Ban - Fix links for rootless podman in [#2384](https://github.com/docker-mailserver/docker-mailserver/pull/2384)
- **[fix]** docs(kubernetes): fix image name in example in [#2385](https://github.com/docker-mailserver/docker-mailserver/pull/2385)
- **[improvement]** consistently make 1 the default value for `SPAMASSASSIN_SPAM_TO_INBOX` in [#2361](https://github.com/docker-mailserver/docker-mailserver/pull/2361)
- **[docs]** added sieve example for subaddress sorting in [#2410](https://github.com/docker-mailserver/docker-mailserver/pull/2410)
- **[feature]** Add changedetector functionality for `${SSL_TYPE} == manual` in [#2404](https://github.com/docker-mailserver/docker-mailserver/pull/2404)
- **[docs]** docs(deps): bump mkdocs-material to v8.2.1 in [#2422](https://github.com/docker-mailserver/docker-mailserver/pull/2422)
- **[feature]** Add SpamAssassin KAM in [#2418](https://github.com/docker-mailserver/docker-mailserver/pull/2418)
- **[improvement]** refactoring: split helper functions into smaller scripts in [#2420](https://github.com/docker-mailserver/docker-mailserver/pull/2420)
- **[fix]** fix: do not add accounts that already exists to account files in [#2419](https://github.com/docker-mailserver/docker-mailserver/pull/2419)
There is also an important regression fixed for `SSL_TYPE=letsencrypt` users.
- **[fix]** A regression with `check-for-changes.sh` introduced in `v10.3.0` affected `SSL_TYPE=letsencrypt`, preventing detection of cert renewals to restart services (_unless using `acme.json`_) [#2326](https://github.com/docker-mailserver/docker-mailserver/pull/2326)
- **[improvement]** Base image upgraded from Debian 10 Buster to Debian 11 Bullseye [#2116](https://github.com/docker-mailserver/docker-mailserver/pull/2116)
- Postfix upgraded from `3.4` to `3.5`. Dovecot upgraded from `2.3.4` to `2.3.13`. Python 2 is no longer included in the image, Python 3 remains (_[more information](https://github.com/docker-mailserver/docker-mailserver/pull/2116#issuecomment-955615529)_).
-`yescrypt` is now supported upstream as a password hash algorithm, `docker-mailserver` continues to use `SHA512-CRYPT` (_[more information](https://github.com/docker-mailserver/docker-mailserver/pull/2116#issuecomment-955800544)_).
- **[chore]** Dovecot statistics service disabled [#2292](https://github.com/docker-mailserver/docker-mailserver/pull/2292)
**WARNING:** This release had a small regression affecting the detection of changes for certificates provisioned in `/etc/letsencrypt` with the config ENV `SSL_TYPE=letsencrypt`, unless you use Traefik's `acme.json`. If you rely on this functionality to restart Postfix and Dovecot when updating your cert files, this will not work and it is advised to upgrade to `v10.4.0` or newer prior to renewal of your certificates.
- **[fix]** The Dovecot `userdb` will now additionally create "dummy" accounts for basic alias maps (_alias maps to a single real account managed by Dovecot, relaying to external providers aren't affected_) when `ENABLE_QUOTAS=1` (default) as a workaround for Postfix `quota-status` plugin querying Dovecot with inbound mail for a user, which Postfix uses to reject mail if quota has been exceeded (_to avoid risk of blacklisting from spammers abusing backscatter_) [#2248](https://github.com/docker-mailserver/docker-mailserver/pull/2248)
- **[fix]** `setup email list` command will no longer attempt to query Dovecot quota status when `ENABLE_QUOTAS` is disabled [#2264](https://github.com/docker-mailserver/docker-mailserver/pull/2264)
- **[fix]** `SSL_DOMAIN` ENV should now work much more reliably [#2274](https://github.com/docker-mailserver/docker-mailserver/pull/2274), [#2278](https://github.com/docker-mailserver/docker-mailserver/pull/2278), [#2279](https://github.com/docker-mailserver/docker-mailserver/pull/2279)
- **[fix]** DKIM - Removed `refile:` (_regex type_) from KeyTable entry in `opendkim.conf`, fixes validation error output from `opendkim-testkey` [#2249](https://github.com/docker-mailserver/docker-mailserver/pull/2249)
- **[fix]** DMARC - Removed quotes around the hostname value in `opendmarc.conf`. This avoids an authentication failure where an OpenDKIM header was previously ignored [#2291](https://github.com/docker-mailserver/docker-mailserver/pull/2291)
- **[fix]** When using `ONE_DIR=1` (default), the `spool-postfix` folder now has the correct permissions carried over. This resolves some failures notably with sieve filters [#2273](https://github.com/docker-mailserver/docker-mailserver/pull/2273)
- **[improvement]** Warnings are now logged for ClamAV and SpamAssassin if they are enabled but Amavis is disabled (_which is required for them to work correctly_) [#2251](https://github.com/docker-mailserver/docker-mailserver/pull/2251)
- **[improvement]** `user-patches.sh` is now invoked via `bash` to assist Kubernetes deployments with `ConfigMap` [#2295](https://github.com/docker-mailserver/docker-mailserver/pull/2295)
### Internal
These changes are primarily internal and are only likely relevant to users that maintain their own modifications related to the changed files.
- **[chore]** Redundant config from Postfix `master.cf` has been removed, it should not affect any users as our images have not included any of the related processes [#2272](https://github.com/docker-mailserver/docker-mailserver/pull/2272)
- **[refactor]** `check-for-changes.sh` was carrying some duplicate code from `setup-stack.sh` that was falling out of sync, they now share common code [#2260](https://github.com/docker-mailserver/docker-mailserver/pull/2260)
- **[refactor]** `acme.json` extraction was refactored into a CLI utility and updated to Python 3 (_required for future upgrade to Debian 11 Bullseye base image_) [#2274](https://github.com/docker-mailserver/docker-mailserver/pull/2274)
- **[refactor]** As part of the Traefik `acme.json` and `SSL_DOMAIN` work, logic for `SSL_TYPE=letsencrypt` was also revised [#2278](https://github.com/docker-mailserver/docker-mailserver/pull/2278)
- **[improvement]** Some minor tweaks to how we derive the internal `HOSTNAME` and `DOMAINNAME` from user configured `hostname` and `domainname` settings [#2280](https://github.com/docker-mailserver/docker-mailserver/pull/2280)
- You no longer need to maintain a copy of `setup.sh` matching your version release from v10.2 of `docker-mailserver` onwards. Version specific functionality of `setup.sh` has moved into the container itself, while `setup.sh` remains as a convenient wrapper to: `docker exec -it <container name> setup <command>`.
- [`ONE_DIR`](https://docker-mailserver.github.io/docker-mailserver/v10.2/config/environment/#one_dir) now defaults to enabled (`1`).
- For anyone relying on internal location of certificates (_internal copy of mounted files at startup_), the Postfix and Dovecot location of `/etc/postfix/ssl` has changed to `/etc/dms/tls`. This may affect any third-party `user-patches.sh` scripts that depended on this path to update certs.
- The [_Let's Encrypt_ section of our SSL / TLS docs](https://docker-mailserver.github.io/docker-mailserver/v10.2/config/security/ssl#lets-encrypt-recommended) has been brought up to date.
### Bigger scripts-related improvements
- **[scripts]** update `setup.sh` to now use a running container first if one exists [#2134](https://github.com/docker-mailserver/docker-mailserver/pull/2134)
- **[scripts]** included `setup.sh` functionality inside the container to be version independent again [#2174](https://github.com/docker-mailserver/docker-mailserver/pull/2174)
- **[scripts]** `HOSTNAME` and `DOMAINNAME` setup improved [#2175](https://github.com/docker-mailserver/docker-mailserver/pull/2175)
- **[scripts]** `delmailuser` can now delete mailboxed without TLD [#2172](https://github.com/docker-mailserver/docker-mailserver/pull/2172)
- **[scripts]** properly exit on failure ([#2199](https://github.com/docker-mailserver/docker-mailserver/pull/2199) in conjunction with [#2196](https://github.com/docker-mailserver/docker-mailserver/pull/2196))
- **[scripts]** make `setup.sh` completely non-interactive for Podman users [#2201](https://github.com/docker-mailserver/docker-mailserver/pull/2201)
### Security
Some internal refactoring and fixes happened this release cycle in [#2196](https://github.com/docker-mailserver/docker-mailserver/pull/2196):
- **[improve]** The Postfix and Dovecot location of `/etc/postfix/ssl` has changed to `/etc/dms/tls`
- **[improve]** An invalid `SSL_TYPE` or a valid value with an invalid configuration will now panic, exiting the container and emitting a fatal error to the logs
- **[fix]** An unconfigured/empty `SSL_TYPE` ENV now correctly disables SSL support for Dovecot and general Postfix configurations. A reminder that this is unsupported officially, and is only intended for tests and troubleshooting. Use only [a valid `SSL_TYPE`](https://docker-mailserver.github.io/docker-mailserver/v10.2/config/environment/#ssl_type) (_`letsencrypt` and `manual` are recommended_) for production deployments
- **[fix]** `TLS_LEVEL=intermediate` now modifies the system (container) `openssl.cnf` config to set the minimum protocol to TLS 1.0 (_from 1.2_) and cipher-suite support to `DEFAULT@SECLEVEL=1` (_from `2`_). This change is required for Dovecot in upcoming Debian Bullseye upgrade, to be compatible with the `TLS_LEVEL=intermediate` cipher-suite profile. It may affect other software within the container that relies on this openssl config, should you extend the Docker image [#2193](https://github.com/docker-mailserver/docker-mailserver/pull/2193)
- **[fix]** Provide DH parameters (_default: RFC 7919 group `ffdhe406.pem`_) at build-time, instead of during startup. Custom DH parameters regardless of `ONE_DIR` are now only detected when mounted to `/tmp/docker-mailserver/dhparams.pem` [#2192](https://github.com/docker-mailserver/docker-mailserver/pull/2192)
- **[docs]** Revise the _Let's Encrypt_ section of our SSL / TLS docs [#2209](https://github.com/docker-mailserver/docker-mailserver/pull/2209)
- **[misc]** introduced GitHub issue forms for issue templates [#2160](https://github.com/docker-mailserver/docker-mailserver/pull/2160)
- **[misc]** Removed the internal `mkcert.sh` script for Dovecot as it is no longer needed [#2196](https://github.com/docker-mailserver/docker-mailserver/pull/2196)
This is bug fix release. It reverts [a regression](https://github.com/docker-mailserver/docker-mailserver/issues/2154) introduced with [#2104](https://github.com/docker-mailserver/docker-mailserver/pull/2104).
This release mainly improves on `v10.1.0` with small bugfixes/improvements and dependency updates
- **[feat]** Add logwatch maillog.conf file to support /var/log/mail/ ([#2112](https://github.com/docker-mailserver/docker-mailserver/pull/2112))
- **[docs]** `CONTRIBUTORS.md` now also shows every code contributor from the past ([#2143](https://github.com/docker-mailserver/docker-mailserver/pull/2143))
- **[improve]** Avoid chmod +x when not needed ([#2127](https://github.com/docker-mailserver/docker-mailserver/pull/2127))
- **[docs]** Various documentation updates ([#2105](https://github.com/docker-mailserver/docker-mailserver/pull/2105), [#2045](https://github.com/docker-mailserver/docker-mailserver/pull/2045), [#2043](https://github.com/docker-mailserver/docker-mailserver/pull/2043), [#2035](https://github.com/docker-mailserver/docker-mailserver/pull/2035), [#2001](https://github.com/docker-mailserver/docker-mailserver/pull/2001))
- **[misc]** Fixed a lot of small bugs, updated dependencies and improved functionality ([#2095](https://github.com/docker-mailserver/docker-mailserver/pull/2095), [#2047](https://github.com/docker-mailserver/docker-mailserver/pull/2047), [#2046](https://github.com/docker-mailserver/docker-mailserver/pull/2046), [#2041](https://github.com/docker-mailserver/docker-mailserver/pull/2041), [#1980](https://github.com/docker-mailserver/docker-mailserver/pull/1980), [#2030](https://github.com/docker-mailserver/docker-mailserver/pull/2030), [#2024](https://github.com/docker-mailserver/docker-mailserver/pull/2024), [#2001](https://github.com/docker-mailserver/docker-mailserver/pull/2001), [#2000](https://github.com/docker-mailserver/docker-mailserver/pull/2000), [#2059](https://github.com/docker-mailserver/docker-mailserver/pull/2059))
This release improves on `9.1.0` in many aspect, including general fixes, Fail2Ban, LDAP and documentation. This release contains breaking changes.
- **[general]** Fixed many prose errors (spelling, grammar, indentation).
- **[general]** Documentation is better integrated into the development process and it's visibility within the project increased ([#1878](https://github.com/docker-mailserver/docker-mailserver/pull/1878)).
- **[general]** Added `stop_grace_period:` to example Compose file and supervisord ([#1896](https://github.com/docker-mailserver/docker-mailserver/pull/1896) [#1945](https://github.com/docker-mailserver/docker-mailserver/pull/1945))
- **[general]** `./setup.sh email list` was enhanced, now showing information neatly ([#1898](https://github.com/docker-mailserver/docker-mailserver/pull/1898))
- **[general]** Added update check and notification ([#1976](https://github.com/docker-mailserver/docker-mailserver/pull/1976), [#1951](https://github.com/docker-mailserver/docker-mailserver/pull/1951))
- **[general]** Moved environment variables to the documentation and improvements ([#1948](https://github.com/docker-mailserver/docker-mailserver/pull/1948), [#1947](https://github.com/docker-mailserver/docker-mailserver/pull/1947), [#1931](https://github.com/docker-mailserver/docker-mailserver/pull/1931))
- **[security]** Major Fail2Ban improvements (cleanup, update and breaking changes, see below)
- **[code]** Added color variables to `setup.sh` and improved the script as a whole ([#1879](https://github.com/docker-mailserver/docker-mailserver/pull/1879), [#1886](https://github.com/docker-mailserver/docker-mailserver/pull/1886))
- **[ldap]** Use dovecots LDAP `uris` connect option instead of `hosts` ([#1901](https://github.com/docker-mailserver/docker-mailserver/pull/1901))
- **[ldap]** Complete rework of LDAP documentation ([#1921](https://github.com/docker-mailserver/docker-mailserver/pull/1921))
- **[docs]** PRs that contain changes to docs will now be commented with a preview link ([#1988](https://github.com/docker-mailserver/docker-mailserver/pull/1988))
### Breaking Changes
- **[security]** Fail2Ban adjustments:
- Fail2ban v0.11.2 is now used ([#1965](https://github.com/docker-mailserver/docker-mailserver/pull/1965)).
- The previous F2B config (from an old Debian release) has been replaced with the latest default config for F2B shipped by Debian 10.
- The new default blocktype is now `DROP`, not `REJECT` ([#1914](https://github.com/docker-mailserver/docker-mailserver/pull/1914)).
- A ban now applies to all ports (`iptables-allports`), not just the ones that were "attacked" ([#1914](https://github.com/docker-mailserver/docker-mailserver/pull/1914)).
- Fail2ban 0.11 is totally compatible to 0.10, but the database got some new tables and fields (auto-converted during the first start), so once updated to DMS 10.0.0, you have to remove the database `mailstate:/lib-fail2ban/fail2ban.sqlite3` if you would need to downgrade to DMS 9.1.0 for some reason.
- **[ldap]** Removed `SASLAUTHD_LDAP_SSL`. Instead provide a protocol in `SASLAUTHD_LDAP_SERVER` and adjust `SASLAUTHD_LDAP_` default values ([#1989](https://github.com/docker-mailserver/docker-mailserver/pull/1989)).
- **[general]** Removed `stable` release tag ([#1975](https://github.com/docker-mailserver/docker-mailserver/pull/1975)):
- Scheduled builds are now based off `edge`.
- Instead of `stable`, please use the latest version tag available (_or the `latest` tag_).
- The `stable` image tag will be removed from DockerHub in the near future.
This release marks the breakpoint where the wiki was transferred to a [reworked documentation](https://docker-mailserver.github.io/docker-mailserver/latest/)
- **[feat]** Support extra `user_attributes` in accounts configuration ([#1792](https://github.com/docker-mailserver/docker-mailserver/pull/1792))
- **[feat]** Add possibility to use a custom dkim selector ([#1811](https://github.com/docker-mailserver/docker-mailserver/pull/1811))
- **[feat]** TLS: Dual (aka hybrid) certificate support! (eg ECDSA certificate with an RSA fallback for broader compatibility) ([#1801](https://github.com/docker-mailserver/docker-mailserver/pull/1801)).
- This feature is presently only for `SSL_TYPE=manual`, all you need to do is provide your fallback certificate to the `SSL_ALT_CERT_PATH` and `SSL_ALT_KEY_PATH` ENV vars, just like your primary certificate would be setup for manual mode.
- **[security]** TLS: You can now use ECDSA certificates! ([#1802](https://github.com/docker-mailserver/docker-mailserver/pull/1802))
- Warning: ECDSA may not be supported by legacy systems (most pre-2014). You can provide an RSA certificate as a fallback.
- **[fix]** TLS: For some docker-compose setups when restarting the docker-mailserver container, internal config state may have been persisted despite making changes that should reconfigure TLS (eg changing `SSL_TYPE` or replacing the certificate file) ([#1801](https://github.com/docker-mailserver/docker-mailserver/pull/1801)).
- **[security]** TLS: `TLS_LEVEL=modern` has changed the server-side preference order to 128-bit before 256-bit encryption ([#1802](https://github.com/docker-mailserver/docker-mailserver/pull/1802)).
- NOTE: This is still very secure but may result in misleading lower scores/grades from security audit websites.
- **[security]** TLS: `TLS_LEVEL=modern` removed support for AES-CBC cipher suites and follows best practices by supporting only AEAD cipher suites ([#1802](https://github.com/docker-mailserver/docker-mailserver/pull/1802)).
- NOTE: As TLS 1.2 is the minimum required for modern already, AEAD cipher suites should already be supported and preferred.
- **[security]** TLS: `TLS_LEVEL=intermediate` has removed support for cipher suites using RSA for key exchange (only available with an RSA certificate) ([#1802](https://github.com/docker-mailserver/docker-mailserver/pull/1802)).
- NOTE: This only affects Dovecot which supported 5 extra cipher suites using AES-CBC and AES-GCM. Your users MUA clients should be unaffected, preferring ECDHE or DHE for key exchange.
- **[refactor]** Complete refactoring of opendkim script ([#1812](https://github.com/docker-mailserver/docker-mailserver/pull/1812)).
- NOTE: Use `./setup.sh config dkim help` to see the new syntax.
The transfer of the old repository to the new organization has completed. This release marks the new starting point for `docker-mailserver` in the `docker-mailserver` organization. Various improvements were made, small bugs fixed and the complete CI was transferred.
- **[general]** transferred the whole repository to `docker-mailserver/docker-mailserver`
- **[general]** adjusted `README.md` and split off `ENVIRONMENT.md`
- **[ci]** usage of the GitHub Container Registry
- **[ci]** switched from TravisCI to **GitHub Actions for CI/CD**
- now building images for `amd64` and `arm/v7` and `arm/64`
