# Change Log

All notable changes to this project will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org/).

## [0.16.7] - 2026-05-28

If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If you are upgrading from v0.15.x and below, please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md) for more information on how to upgrade from previous versions.

## Added
- RateLimit header fields for HTTP ([draft-ietf-httpapi-ratelimit-headers-10](https://datatracker.ietf.org/doc/html/draft-ietf-httpapi-ratelimit-headers-10))
- MTA: Implement `spamtest` in trusted Sieve scripts.

## Changed

## Fixed
- Log rejected messages to tracing store.
- MTA:
  - Always update next DSN notify times.
  - Expand lists and resolve catch-all addresses when building autogenerated messages.
- Sharing: Includes resource that themselves carry a direct ACL grant and are leaves.
- Tasks cannot be deleted in OSS builds.
- Directory: Per-domain external directory resolution fails.
- DNS updater: Keep external `TXT` records when updating RRSet.
- HTTP: Reject requests from blocked IPs when `Keep-Alive` is enabled.

## [0.16.6] - 2026-05-20

If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If you are upgrading from v0.15.x and below, please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md) for more information on how to upgrade from previous versions.

## Added
- Added 58 new DNS provider integrations (see [dns-update](https://github.com/stalwartlabs/dns-update/blob/main/CHANGELOG.md#dns-update-040) crate for details).
- DNS updater: Log DNS record types and values.
- Sieve: Allow User Sieve scripts to access `orcpt`.
- MTA: Log when messages are rejected or discarded by the spam classifier.

## Changed
- Bump JMAP File Storage to [draft-ietf-jmap-filenode-14](https://datatracker.ietf.org/doc/html/draft-ietf-jmap-filenode-14).
- Accept password hashes with `$` or `{` prefixes as secure secrets.

## Fixed
- DAV: `acl-principal-prop-set` REPORT enforced the wrong privilege.
- JMAP: `Thread/get` did not filter by per-mailbox ACLs on shared accounts.
- IMAP: `UID FETCH N:*` could miss messages moved into a SELECTed mailbox by another connection.
- DNS updater:
  - Skip `v=spf1 a -all` records for apex domains.
  - RFC2136 TSIG: regression related to multiplexer.
  - Route53: Chunk `TXT` records when they exceed 255 characters.
- ACME: 
  - Update `defaultCertificateId` when renewing a certificate that is currently set as default.
  - Perform `DNS-01` authorizations sequentially to avoid race conditions in some DNS providers.
- Allow internal TLDs and special characters in e-mail addresses.
- Websocket: Perform case insensitive matching during upgrade.
- LDAP: Synchronize accounts when expanding mailing list recipients.
- Sieve: `replace` action adds an extra `From` header.
- ACL: Orphaned ACL entries for deleted accounts cause JMAP session errors.

## [0.16.5] - 2026-05-11

If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If you are upgrading from v0.15.x and below, please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md) for more information on how to upgrade from previous versions.

## Added
- `is_ip_in_cidr` expression function for CIDR matching.

## Changed
- Bump `mail-auth` to 0.9 (which bumps `hickory-resolver` to 0.26).
- Deprecated RFC2136 SIG(0) support as it is no longer supported by `hickory`.

## Fixed
- JMAP: 
  - Patching ids containing digits in JSON Pointers fails.
  - Patching nested objects with `null` values fails.
- External directories:
  - SQL: Return `Failed` instead of `Error` when the query returns no results.
  - LDAP: Impersonation fails when the user has not logged in before.
- Network: Attempt binding to IPv4 when binding to IPv6 fails with `EAFNOSUPPORT` error.
- Bootstrap: Timeout after 30 seconds when probing the data store.
- HTTP: Use permissive CORS headers for `.well-known` endpoints.
- ACME: 
  - Include apex domains when requesting certificates for subdomains.
  - Use the public suffix list to determine the zone name when no origin is provided.
- MTA:
  - Allow rescheduling recipients with permanent failures.
  - Process reports using original `RCPT` before rewriting.
- Autodiscover v2 endpoint unreachable.
- DNS update (via `dns-update` crate):
  - OVH + Google Cloud DNS: Fix FQDN handling for `MX` and `SRV` records.
  - Route53: Fix changeset error resolution.
  - deSEC: Use empty `subname` for apex records instead of `@`, which the API rejects.
  - Cloudflare: Wrap `TXT` record content in double quotes (RFC 1035) to suppress dashboard warnings.
- iCalendar/JSCalendar (via `calcard` crate):
  - Support `STATUS:CANCELLED` mapping from `VTODO` to JSCalendar.
  - Fixed duration parsing for zero duration `PT0S`.

## [0.16.4] - 2026-05-05

If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If you are upgrading from v0.15.x and below, please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md) for more information on how to upgrade from previous versions.

## Added

## Changed

## Fixed
- Live tracing in community and OSS versions.
- Timezone changes from the `AccountSettings` object return `invalidProperties`.
- `mail-parser` panic with certain messages containing corrupted attachments.
- Pagination by anchor for queued messages, tasks and metrics.
- Spam filter: Use original instead of rewritten `RCPT` on checks.
- JMAP:
  - References in nested objects not resolved.
  - `AddressBook/query` fetches wrong resources.
- Import tool fails to restore registry entries.
- FDB: Allow multiple FoundationDB instances in the same process.
- Autoconfig: Return `%EMAILADDRESS%` when no email address is provided.
- Quota: Include Sieve scripts in quota recalculations.

## [0.16.3] - 2026-04-30

If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If you are upgrading from v0.15.x and below, please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md) for more information on how to upgrade from previous versions.

## Added

## Changed
- Replaced `STALWART_HTTPS_PORT` with `STALWART_PUBLIC_URL`.
- App Passwords now begin with `app_` instead of `app ` to avoid issues with some clients that do not support spaces in passwords.

## Fixed
- Directory: 
  - Invalidate caches when group memberships change on an external directory.
  - OIDC: errors instead of "failed to decode token".
  - OIDC: Recovery admin access.
  - User impersonation.
- Tasks:
  - Delete locked tasks.
  - Queue pagination by anchor.
- Log viewer: All events show as `INFO`.
- Registry: Allow changing object variants.
- Node id renewal.
- DNS Updater: Fix Route53 serialization format.

## [0.16.2] - 2026-04-28

If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If you are upgrading from v0.15.x and below, please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md) for more information on how to upgrade from previous versions.

## Added
- OIDC: Fallback to `userinfo` endpoint when JWT token does not contain an email claim.
- S3: `verifyAfterWrite` option to verify that objects have persisted after writing.

## Changed
- Allow HTTP to be used for configuring the server.

## Fixed
- LDAP: Generate valid `credentialId` when there are password changes.
- TLS: Disable cipher suited option disables wrong ciphers.
- DNS Updater:
  - BunnyDNS: Use subdomain as name of record instead of FQDN.
  - RFC2136: Chunk TXT records.
- Skip invalid entries in log files.

## [0.16.1] - 2026-04-25

If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If you are upgrading from v0.15.x and below, please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md) for more information on how to upgrade from previous versions.

## Added
- OIDC: Extract username from JWT token.
- `system('node_hostname')` and `system('node_role')` expression variables to retrieve the local node hostname and cluster role respectively.

## Changed

## Fixed
- JMAP:
  - Invalid `receivedAt` headers after importing (#2939).
  - Sorting order issues when emails lack `receivedAt` headers.
- IMAP: Fix `BINARY` fetch responses (#2940).
- WebDAV: Fix ACL validation for target folders.
- ACME: Allow requesting apex domain certificates.
- Hostname issues: 
  - Accept RFC 6761 reserved TLDs during bootstrap.
  - Allow hostnames without TLDs in remote server settings.
- Reverse proxy issues.
- OSS builds.
- DNS Updater:
  - RFC2136: TSIG secret not base64 decoded.
  - Google DNS: Chunk TXT records when they exceed 255 characters.
  - Cloudflare: 
    - Fix `CAA` record updates.
    - Check zone subdomains when finding zones

## [0.16.0] - 2026-04-20

This version includes **multiple breaking changes**. If you are upgrading from v0.15.x and below, please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md) for more information on how to upgrade from previous versions.

## Added
- [Web UI](https://github.com/stalwartlabs/webui) rewritten from the ground up using the JMAP management API, featuring a refreshed design and addressing 76 enhancement requests and bug fixes.
- [CLI](https://github.com/stalwartlabs/cli) rewritten from the ground up to use the JMAP management API.
- Security enhancements:
  - Password strength enforcement using the `zxcvbn` algorithm
  - Password expiration, rotation policies and IP address restrictions for user accounts
  - App Passwords with limited access (#1609), labels (#2255), IP address restrictions and expiration dates
  - API keys with limited access, labels, IP address restrictions and expiration dates
  - Auto-ban comments and details about the triggering event (#1321)
  - Auto-ban expiration after a configurable time period (#964)
- DNS Management:
  - Automatic DNS management of `MX`, `TXT`, `CNAME`, `SRV`, `CAA` and `TLSA` records (#463 #1017 #1419 #2438 #1370 #1406 #1371)
  - Automatic update of `TLSA` records when ACME certificates change (#1664)
  - RFC2136 `SIG(0)` support (#856)
  - Route53 provider support (contributed by @jimmystewpot)
  - Google Cloud DNS provider support (contributed by @jimmystewpot)
  - Bunny provider support (contributed by @angeloanan)
  - Porkbun provider support (contributed by @jeffesquivels)
  - DNSimple provider support (contributed by @NelsonVides)
  - Spaceship provider support (contributed by @matserix)
- DKIM:
  - Automatic DKIM key generation, rotation and DNS management (#368 #961)
  - Store DKIM keys in the database (#1264)
  - Ignore insecure signatures when verifying DKIM (#1068 #467)
- ACME/TLS:
  - `DNS-PERSIST-01` ACME challenge support (#2837)
  - Renew certificates on demand, view certificate details (#675 #1162 #2566)
  - `CAA` record support (#468) with `accounturi` parameter (#1933)  
  - `TLSA` records publishing restricted to `3 1 1` and `2 1 1` (#2193)
- OIDC and OAuth:
  - JWT token validation without requesting userinfo from the OIDC provider.
  - Audience (`aud`) claim (#2603) and scope validation support.
  - Groups support (#1448)
  - RFC 7636 - Proof Key for Code Exchange by OAuth Public Clients
- LDAP:
  - Separate filter for groups (#1841)
  - Improve support for OpenLDAP schemas (#760)
  - Improve and simplify LDAP settings (#2194 #2174)
- Directory:
  - Masked email addresses for enhanced privacy (*Enterprise*)
  - Domain aliases (#583)
  - E-mail alias descriptions and option to disable aliases (#506)
  - Account archiving and un-deletion (#2767) (*Enterprise*)
  - Per-domain directory backends (*Enterprise*)
- Account configuration and discovery:
  - Automatic Configuration of Email, Calendar, and Contact Server Settings ([draft-mailmaint-uaautoconf-04](https://datatracker.ietf.org/doc/html/draft-eggert-mailmaint-uaautoconf-04)) (#2201)
  - MS Autodiscover V2 support (#679)
- Sieve: Allow deactivating scripts without deleting them (#1251).
- Tracing: Enable events only mode (#2276)
- Clustering:
  - Automatic cluster node ID generation and management.
  - Unified cluster management (#960)
  - Outbound MTA role (#1692)

## Changed
- Replaced REST API with JMAP API (#2262 #959 #1480)
- Removed support for Authenticated Received Chain (ARC) sealing ([learn more](https://mailarchive.ietf.org/arch/msg/dmarc/KvX3-H1SL0Gh3IDl7FuR2hoR87M/)).
- Directory: Removed `smtp`, `imap` and `memory` directory backends.
- Use `aws-lc` for cryptographic operations instead of `ring`.
- Use `rustls-platform-verifier` for TLS certificate verification instead of `webpki` (#247).

## Fixed
- Directory:
  - Cannot remove built-in "admin" role from user once it was assigned (#1467)
  - Delete associated records (#963)
  - Updated Role permissions not applied (#2038)
  - Recreated account cannot log in until server is restarted (#1469)
  - Subaddressing does not work for groups (#475)
  - New LDAP aliases are rejected (#1318). 
  - Validate account and group names (#2209)
- MTA:
  - RCPT TO stage settings improvements (#2217 #394)
  - Relay to IP addresses (#838)
  - Duplicate delivery inverted check
  - SASL challenge responses include invalid `Go ahead` text
- JMAP: 
  - Fix `inMailboxOtherThan` query logic.
  - Fix `hasAttachment` search field (#2778)
- IMAP: 
  - Increment argument max length to `8000` bytes
  - ACL: Add `RIGHTS` capability (#2762)
  - ACL: Fix `ACL SET` permission override.
- WebDAV: 
  - Return `304` `NOT_MODIFIED` on `If-None-Match`
  - Use RFC 2616 instead of RFC 1123 for date formatting
  - Fix ACL container/item mismatch in reports.
  - CalDAV: Allow organized properties to be present in `PUT` requests if they are equal to the existing ones.
  - CalDAV: Enforce cumulative iCalendar instances cap in CalDAV free-busy REPORT handler
- Configuration: Prefix parsing issues (#2495)
- OIDC: JWKS Exposes Symmetric Signing Key
- SQLite: Fix thread pool exhaustion.
- PostgreSQL: Use clean recycling method on connection pool
- Meilisearch: Make `id` sorteable.
- ACME: Fix wrong origin for subdomain updates (#2360)
- Spam filter: Skip invalid messages during training.
- Calendar: Include minutes in localized invite templates (#2828)
- HTTP: Fix `204` CORS preflight responses

## [0.15.5] - 2026-02-14

If you are upgrading from v0.14.x and below, this version includes **multiple breaking changes**. Please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_15.md) for more information on how to upgrade from previous versions.
If you are upgrading from v0.15.x, replace the binary and update the webadmin.

## Added

## Changed

## Fixed
- IMAP/JMAP: OOM when `mail-parser` returns cyclical MIME structures [CVE-2026-26312](https://github.com/stalwartlabs/stalwart/security/advisories/GHSA-jm95-876q-c9gw).
- Tracing: Fix tracing indexing when using separate stores.
- JMAP: Fix `upToId` computation in `*/queryChanges`.
- JMAP: Include createdIds when the property is present.
- JMAP: Respect query arguments in `Email/queryChanges`.
- JMAP: Return the correct container/item change id when there are no changes.

## [0.15.4] - 2026-01-19

If you are upgrading from v0.14.x and below, this version includes **multiple breaking changes**. Please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_15.md) for more information on how to upgrade from previous versions.
If you are upgrading from v0.15.x, replace the binary and update the webadmin.

## Added
- IMAP: Map `HEADER SUBJECT/FROM/TO` searches to `SUBJECT/FROM/TO` queries.
- Sieve: Update spam status on user scripts.

## Changed

## Fixed
- Search: Return all document ids when no filters are provided.
- Search: Filters not applied when a single message is in the account.
- IMAP: Return `ALREADYEXISTS` code when creating existing mailboxes.
- IMAP: Do not return quota resources if no quota is set.
- JMAP/changes: Update `newState` with last changeId if an invalid fromChangeId is provided.
- JMAP/CalendarIdentity: Do not update invalid calendar identities.
- AI API: Include request error details if available.

## [0.15.3] - 2025-12-29

If you are upgrading from v0.14.x and below, this version includes **multiple breaking changes**. Please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_15.md) for more information on how to upgrade from previous versions.
If you are upgrading from v0.15.x, replace the binary and update the webadmin.

## Added
- Polish locale support (contributed by @mrxkp) (#2480)

## Changed

## Fixed
- Meilisearch: Return correct error messages when failing to create indexes (#2574)
- PostgreSQL search: Truncate emails to 650kb for full-text search indexing.
- FoundationDB search: Batch large transactions (#2567).
- Spam filter: Fix training sample size checks
- IMAP: Fix UTF7 encoding with Emojis (contributed by @dojiong) (#2564).

## [0.15.2] - 2025-12-22

If you are upgrading from v0.14.x and below, this version includes **multiple breaking changes**. Please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_15.md) for more information on how to upgrade from previous versions.
If you are upgrading from v0.15.x, replace the binary and update the webadmin.

## Added
- OAuth: Add device authorization endpoint (#2225).

## Changed
- Antispam: Only auto-learn spam from traps or multiple RBL hits.

## Fixed
- mySQL search: Use `MEDIUMTEXT` field type for email body and attachments (#2544).
- PostgreSQL search: Truncate large text fields.
- ElasticSearch: Implement pagination (#2551).
- Antispam: Fix `NO_SPACE_IN_FROM` spam tag detection logic (#2372).
- IMAP: Fix shared folder double nesting (test suite credits to @ochnygosch) (#2358).
- JMAP: Use latest `Received` header in JMAP `Email/import` (credits to @apexskier) (#2374).
- JMAP: Return unsorted search results when the index is not ready (#2544).
- LDAP: Lowercase attribute comparison (credits to @pdf) (#2363).
- CLI: Fix same-host JMAP redirection on non-standard ports (#2271).

## [0.15.1] - 2025-12-17

This version includes **multiple breaking changes**. If you are upgrading from v0.14.x and below, please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_15.md) for more information on how to upgrade from previous versions.

## Added

## Changed

## Fixed
- PostgreSQL: Sanitize search index values (#2533)
- Elasticsearch: Ignore `resource_already_exists_exception` errors when creating indexes (#2535)
- Migrate 0.13.x data (#2534)

## [0.15.0] - 2025-12-16

This version includes **multiple breaking changes**. Please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_15.md) for more information on how to upgrade from previous versions.

## Added
- Linear spam classifier using FTRL-Proximal and feature/cuckoo hashing.
- Meilisearch store backend implementation (#1482).
- PostgreSQL and mySQL native full-text search support.
- Multiple performance improvements and database access optimizations.
- Encryption-at-rest: Spam training privacy setting. 
- Enterprise: Undelete e-mail feature now includes From/Subject/Received information.
- IMAP: Implemented new keywords and mailbox attributes described in [draft-ietf-mailmaint-messageflag-mailboxattribute-13](https://datatracker.ietf.org/doc/html/draft-ietf-mailmaint-messageflag-mailboxattribute-13)

## Changed
- IMAP: Always return special use flags in responses.

## Fixed
- JMAP: `FileNode/set` fails to delete files (#2485).
- JMAP: Return error when using `blobId` in JSContact and JSCalendar (#2431).
- Directory: Deletion of list or domain issues (#2415).
- MTA: Headers and body stripped from mail delivery subsystem failure notifications (#2344).
- MTA: Hooks only run if sieve script, milter or rewrite is configured (#2317).
- Autodiscover: Endpoint should be case insensitive (#2440).
- Housekeeper: Panic during DST transition (#2366).
- Import/Export: Fix import/export utility (#1882).
- Enterprise: Remove tenant admin permissions when license is invalid.

## [0.14.1] - 2025-10-28

If you are upgrading from v0.13.4 and below, this version includes **breaking changes** to the internal directory, calendar and contacts. Please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_14.md) for more information on how to upgrade from previous versions.

## Added
- Autoconfig for CalDAV, CardDAV and WebDAV (#1937)

## Changed
- HTTP: Remove HTTP STS `preload` directive.

## Fixed
- Directory: Keep OTP Auth and AppPasswords unless the remote directory provides new ones (#2319)
- JMAP: Fix `ContactCard/set` and `CalendarEvent/set` destroy methods (#2308).

## [0.14.0] - 2025-10-22

If you are upgrading from v0.13.4 and below, this version includes **breaking changes** to the internal directory, calendar and contacts. Please read the [upgrading documentation](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_14.md) for more information on how to upgrade from previous versions.

## Added
- JMAP for Calendars ([draft-ietf-jmap-calendars](https://datatracker.ietf.org/doc/draft-ietf-jmap-calendars/)).
- JMAP for Contacts  ([RFC 9610](https://datatracker.ietf.org/doc/rfc9610/)).
- JMAP for File Storage ([draft-ietf-jmap-filenode](https://datatracker.ietf.org/doc/draft-ietf-jmap-filenode/)).
- JMAP Sharing ([RFC 9670](https://datatracker.ietf.org/doc/rfc9670/))
- CalDAV: support for `supported-calendar-component-set` (#1893)
- i18n: Greek language support (contributed by @infl00p)
- i18n: Swedish language support (contributed by @purung)

## Changed
- **Breaking Database Changes** (migrated automatically on first start):
  - Internal directory schema changed.
  - Calendar and Contacts storage schema changed.
  - Sieve scripts storage schema changed.
  - Push Subscriptions storage schema changed.
- Replaced `sieve.untrusted.limits.max-scripts` and `jmap.push.max-total` with `object-quota.*` settings. 
- Cluster node roles now allow sharding.


## Fixed
- Push Subscription: Clean-up of expired subscriptions and cluster notification of changes (#1248)
- CalDAV: Per-user CalDAV properties (#2058)

## [0.13.4] - 2025-09-30

If you are upgrading from v0.11.x or v0.12.x, this version includes **breaking changes** to the message queue and MTA configuration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added

## Changed
- JMAP: Protocol layer rewrite for zero-copy deserialization and architectural improvements.

## Fixed
- IMAP: Unbounded memory allocation in request parser ([CVE-2025-61600 ](https://github.com/stalwartlabs/stalwart/security/advisories/GHSA-8jqj-qj5p-v5rr)).
- IMAP: Wrong permission checked for GETACL.
- JMAP: References to previous method fail when there are no results (#1507).
- JMAP: Enforce quota checks on `Blob/copy`.
- JMAP: `Mailbox/get` fails without `accountId` argument (#1936).
- JMAP: Do not return `invalidProperties` when email update doesn't contain changes (#1139)
- iTIP: Include date properties in `REPLY` (#2102).
- OIDC: Do not set `username` field if it is the same as the `email` field.
- Telemetry: Fix `calculateMetrics` housekeeper task (#2155).
- Directory: Always use `rsplit` to extract the domain part from email addresses.

## [0.13.3] - 2025-09-10

If you are upgrading from v0.11.x or v0.12.x, this version includes **breaking changes** to the message queue and MTA configuration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added
- CLI: Health checks (contributed by @Codekloeppler)

## Changed
- WebDAV: Assisted discovery v2

## Fixed
- iTIP: Do not send a REPLY when deleting an event that was not accepted.
- iTIP: Include event details in REPLY messages (#2102).
- iTIP: Add organizer to iMIP replies if missing to deal with MS Exchange 2010 bug.
- OIDC: Do not overwrite locally defined aliases (#2065).
- HTTP: Scan ban should only be triggered by HTTP parse errors.
- HTTP: Skip scanner fail2ban checks when the proxy client IP can't be parsed (#2121).
- JMAP: Do not allow roles to be removed from system mailboxes (#1977).
- JMAP WS: Fix panic when using invalid server url.
- SMTP: Do no send `EHLO` twice when `STARTTLS` is unavailable (#2050).
- IMAP: Allow `ENABLE UTF8` in IMAPrev1.
- IMAP: Include `administer` permission in ACL responses.
- IMAP: Add owner rights to ACL get responses.
- IMAP: Do not auto-train Bayes when moving messages from Junk to Trash.
- IMAP/ManageSieve: Increase maximum quoted argument size (#2039).
- CalDAV: Limit recurrence expansions in calendar reports ([CVE-2025-59045](https://github.com/stalwartlabs/stalwart/security/advisories/GHSA-xv4r-q6gr-6pfg)).
- WebDAV: Do not fix percent encoding on WebDAV FS (#2036).

## [0.13.2] - 2025-07-28

If you are upgrading from v0.11.x or v0.12.x, this version includes **breaking changes** to the message queue and MTA configuration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added
- ACME: DeSEC cloud DNS provider support (contributed by @Tyr3al).
- ACME: OVH cloud DNS provider support (contributed by @srachner).
- CalDAV Scheduling: Catalan language support (contributed by @jolupa) (#1873).
- MTA: Allow to send e-mails as group, while member of that group (#485).
- OIDC: Allow local access tokens to be used with third-party OIDC backends (#1311 stalwartlabs/webadmin#52).

## Changed
- IMAP: Return `OK` when moving/copying non-existent messages (#670).
- IMAP: Copy flags when copying/moving messages between accounts.

## Fixed
- MTA: Do not convert e-mail local parts to lowercase (#1916).
- Sieve: `fileinto` should override spam filter (#1917).
- JMAP: Incorrect `accountId` used in email set and import methods (#1777).
- WebDAV: Always return `MULTISTATUS` when calendar-query yields no results.
- LDAP: Only set account name if not returned in LDAP query (#1471).
- Enterprise: Invalidate logo cache when changes are made (#1856).
- Enterprise: Fix tenant quota update API.

## [0.13.1] - 2025-07-16

If you are upgrading from v0.11.x or v0.12.x, this version includes **breaking changes** to the message queue and MTA configuration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added
- ACME: DigitalOcean cloud DNS provider support (#1667).

## Changed

## Fixed
- Migration: Old queue events not deleted causing high CPU usage in some deployments (#1833).
- MTA: `mta-sts` setting parsing issue (#1830).
- JMAP: `sortOrder` should not be null (#1831).
- Allow invalid TOML when parsing database settings (#1822).

## [0.13.0] - 2025-07-15

If you are upgrading from v0.11.x or v0.12.x, this version includes **breaking changes** to the message queue and MTA configuration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added
- MTA queue enhancements (#1246 #1035 #457).
- Danish locale support (contributed by @Fadil2k) (#1772).
- DKIM support for `stalwart-cli` (contributed by @rmsc) (#1804).

## Changed
- Invalidate access token caches in a cluster using pub/sub (#1741).
- Allow updating secrets for all directory types.

## Fixed
- WebDAV: Return all shared resources in `calendar-home-set` and `addressbook-home-set` (#1796).
- WebDAV ACL: Fix write permission and `multiget` reports (#1768).
- CalDAV Scheduling: Include `DTSTART`/`DTEND` properties in iMIP `CANCEL` messages (#1775).
- HTTP: Do not include `WWW-Authenticate` headers in API responses (#1795).
- API: Allow API keys to be used with external directories (#1815).
- IMAP: Fix issue creating subfolders under INBOX for group shared folder (#1817).
- IMAP: Custom Name for Shared Folders ignored (#1620).
- LDAP: `local` placeholder should return username when its not an email address (#1784).

## [0.12.5] - 2025-06-25

If you are upgrading from v0.11.x, this version includes **breaking changes** to the database layout and requires a migration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added
- Calendar Scheduling Extensions to CalDAV - RFC6368 (#1514)
- Calendar E-Mail Notifications (#1514)
- Limited i18n support for calendaring events.
- Assisted CalDAV/CardDAV shared resource discovery (#1691).

## Changed
- JMAP: Allow unauthenticated access to JMAP session object.

## Fixed
- WebDAV: Return NOTFOUND error instead of MULTISTATUS on empty PROPFIND responses (#1657).
- WebDAV: Update account name when refreshing DAV caches (#1694).
- JMAP: Do not include email address in identity names (#1688).
- IMAP: Normalize `INBOX` name when creating/renaming folders (#1636).
- LDAP: Request `secret-changed` attribute in LDAP queries (#1409).
- Branding: Unable to change logos (#1652).
- Antispam: Skip `card-is-ham` override when sender does not pass DMARC (#1648).
- FoundationDB: Renew old/expired FDB read transactions after the `1007` error code is received rather than estimating expiration time.

## [0.12.4] - 2025-06-03

If you are upgrading from v0.11.x, this version includes **breaking changes** to the database layout and requires a migration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added
- LDAP authentication enhancements (#1269 #1471 #795 #1496).
- MTA: Return Queue IDs during message acceptance (#927).

## Changed
- LDAP: `bind.auth.enable` is now `bind.auth.method`, read the updated [LDAP documentation](https://stalw.art/docs/auth/backend/ldap) for more information.

## Fixed
- DNS: `hickory-resolver` bug hitting 100% CPU usage when resolving DNSSEC records.
- IMAP: Return the message UID in the destination mailbox if the message already exists (#1201).
- MTA: TLS reports being issued for sent TLS reports (infinite loop) (#1301).
- WebDAV: Return `CTag` on `/dav/cal/account` resources to force iOS synchronize.
- CardDAV: Strict vCard parsing (#1607).
- WebDAV: Dead property updates (#1611).
- WebDAV: Use last change id in `CTag`.

## [0.12.3] - 2025-05-30

If you are upgrading from v0.11.x, this version includes **breaking changes** to the database layout and requires a migration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added
- Store vanished IMAP UIDs and WebDAV paths in the changelog.

## Changed

## Fixed
- XML `CDATA` injection (credits to @andreymal for the report).
- Macro references are replaced with their content when writing config file (#1595).
- Double nested CalDAV and CardDAV property tags (#1591).
- Allow empty properties in PROPPATCH requests (#1580).

## [0.12.2] - 2025-05-27

If you are upgrading from v0.11.x, this version includes **breaking changes** to the database layout and requires a migration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added
- CardDAV: Legacy vCard 2.1 and 3.0 serialization support.
- WebDAV: Add SRV Records to help DAV autodiscovery (closes #1565).

## Changed

## Fixed
- Report list attempts to deserialize empty values (#1562)
- Refresh expired FoundationDB transactions while retrieving large blobs (#1555).

## [0.12.1] - 2025-05-26

If you are upgrading from v0.11.x, this version includes **breaking changes** to the database layout and requires a migration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

## Added

## Changed

## Fixed
- Migration tool to generate the correct next id (#1561).
- Failed to parse setting dav.lock.max-timeout (closes #1559).
- Failed to build OpenTelemetry span exporter: no http client specified (#1571).

## [0.12.0] - 2025-05-26

This version includes **breaking changes** to the database layout and requires a migration. Please read the [UPGRADING.md](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING.md) file for more information on how to upgrade from previous versions.

### Added
- [Collaboration](https://stalw.art/docs/collaboration/overview) features including [Calendars over CalDAV](https://stalw.art/docs/http/calendar/), [Contacts over CardDAV](https://stalw.art/docs/http/contact/) and [File Storage over WebDAV](https://stalw.art/docs/http/file-storage/).
- Peer-to-peer [cluster coordination](https://stalw.art/docs/cluster/coordination/overview) or with Apache Kafka, Redpanda, NATS or Redis.
- Incremental caching of emails, calendars, contacts and file metadata.
- Zero-copy deserialization.
- Train spam messages as ham when the sender is in the user's address book.  
- `XOAUTH2` SASL mechanism support (#1194 #1369).
- Support for RFC9698, the `JMAPACCESS` Extension for IMAP.
- Search index for accounts and other principals (#1368).
- Add `description` property to OIDC ID token (#1234).

### Changed
- Deprecated gossip protocol in favor of the new [coordinator](https://stalw.art/docs/cluster/coordination/overview) options.
- Renamed Git repository from `stalwartlabs/mail-server` to `stalwartlabs/stalwart` and the Docker image from `stalwartlabs/mail-server` to `stalwartlabs/stalwart`.
- Renamed multiple settings:
  - `server.http.*` to `http.*`.
  - `jmap.folders.*` to `email.folders.*`.
  - `jmap.account.purge.frequency` to `account.purge.frequency`.
  - `jmap.email.auto-expunge` to `email.auto-expunge`.
  - `jmap.protocol.changes.max-history` to `changes.max-history`.
  - `storage.encryption.*` to `email.encryption.*`.
- Deprecated `lookup.default.*` settings in favor of `server.hostname` and `report.domain`. v0.11 and before supported both, v0.12 will only support the new settings.

### Fixed
- Allow undiscovered UIDs to be used in IMAP `COPY`/`MOVE` operations (#1201).
- Refuse loopback SMTP delivery (#1377).
- Hide the current server version (#1435).
- Use the newest `X-Spam-Status` Header (#1308).
- MySQL Driver error: Transactions couldn't be nested (#1271).
- Spawn a delivery thread for `EmailSubmission/set` requests (#1540).
- ACME: Don't restrict challenge types (#1522).
- Autoconfig: return `%EMAILADDRESS%` if no e-mail address is provided (#1537).

## [0.11.8] - 2025-04-30

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added

### Changed

### Fixed
- Allow undiscovered UIDs to be used in `COPY`/`MOVE` operations (#1201).

## [0.11.7] - 2025-03-23

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- LDAP attribute to indicate password change (#1156).

### Changed
- Lazy DKIM key parsing (#1211).
- Enable `edns0` for system resolver by default (#1282).
- Bump FoundationDB to `7.3`.

### Fixed
- Fix incorrect `UIDNEXT` when mailbox is empty (#1201).
- Sender variable not set when evaluating `must-match-sender` (#1294).
- Do not panic when mailboxId is not found (#1293).
- Prioritize local over span keys when serializing webhook payloads (#1250).
- Allow TLS name mismatch as per RFC7671 Section 5.1.
- Try with implicit MX when no MX records are found.
- SQL `secrets` directory query.

## [0.11.5] - 2025-02-01

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added

### Changed
- Open source third party OIDC support.

### Fixed
- Case insensitive flag parsing (#1138).
- BCC not removed from JMAP EmailSubmissions (#618).
- Group pipelined IMAP FETCH and STATUS operations (#1096).

## [0.11.4] - 2025-01-29

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- RFC 9208 - IMAP QUOTA Extension (#484).

### Changed
- `session.throttle.*` is now `queue.limiter.inbound.*`.
- `queue.throttle.*` is now `queue.limiter.outbound.*`.
- Changed DNSBL error level to debug (#1107).

### Fixed
- Creating a mailbox in a shared folder results in wrong hierarchy (#1128).
- IMAP LIST-STATUS (RFC 5819) returns items in wrong order (#1129).
- Avoid non-RFC SMTP status codes (#1109).
- Do not DNSBL check invalid domains (#1107).
- Sieve message flag parser (#1059).
- Sieve script import case insensitivity (#962).
- `mailto:` parsing in HTMLs.

## [0.11.2] - 2025-01-17

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- Automatic revoking of access tokens when secrets, permissions, ACLs or group memberships change (#649).
- Increased concurrency for local message delivery (configurable via `queue.threads.local`).
- Cluster node roles.
- `config_get` expression function.

### Changed
- `queue.outbound.concurrency` is now `queue.threads.remote`.
- `lookup.default.hostname` is now `server.hostname`.
- `lookup.default.domain` is now `report.domain`.

### Fixed
- Distributed locking issues in non-Redis stores (#1066).
- S3 incorrect backoff wait time after failures.
- Panic parsing broken HTMLs.
- Update CLI response serializer to v0.11.x (#1082).
- Histogram bucket counts (#1079).
- Do not rate limit trusted IPs (#1078).
- Avoid double encrypting PGP parts encoded as plain text (#1083).
- Return empty SASL challenge rather than "" (#1064).

## [0.11.0] - 2025-01-06

This version includes breaking changes to the configuration file, please read [UPGRADING.md](UPGRADING.md) for details.
To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- Spam filter rewritten in Rust for a significant performance improvement.
- Multiple spam filter improvements (#947) such as training spam/ham when moving between inbox and spam folders (#819).
- Improved distributed locking and handling of large distributed SMTP queues.
- ASN and GeoIP lookups.
- Bulk operations REST endpoints (#925).
- Faster S3-FIFO caching.
- Support adding the `Delivered-To` header (#916).
- Semver compatibility checks when upgrading (#844).
- Sharded In-Memory Store.

### Changed
- Removed authentication rate limit (no longer necessary since there is fail2ban).
- Pipes have been deprecated in favor of MTA hooks.

### Fixed
- OpenPGP EOF error (#1024).
- Convert emails obtained from external directories to lowercase (#1004).
- LDAP: Support both name and email fields to be mapped to the same attribute.
- Admin role can't be assigned if an account with the same name exists.
- Fix macro detection in DNS record generation (#978).
- Use host FQDN in install script (#1003).

## [0.10.7] - 2024-12-04

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- Delivery and DMARC Troubleshooting (#420).
- Support for external email addresses on mailing lists (#152).
- Azure blob storage support.

### Changed

### Fixed
- Some mails can't be moved out of the junk folder (#670).
- Out of bound index error on Sieve script (#941).
- Missing `User-Agent` header for ACME (#937).
- UTF8 support in IMAP4rev1 (#948).
- Account alias owner leak on autodiscover.
- Include all events in OTEL traces + Include spanId in webhooks.
- Implement `todo!()` causing panic on concurrency and rate limits.
- Mark SQL store as active if used as a telemetry store.
- Discard empty form submissions.

## [0.10.6] - 2024-11-07

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- Enterprise license automatic renewals before expiration (disabled by default).
- Allow to LDAP search using bind dn instead of auth bind connection when bind auth is enabled (#873)

### Changed

### Fixed
- Include `preferred_username` and `email` in OIDC `id_token`.
- Verify roles and permissions when creating or modifying accounts (#874)

## [0.10.5] - 2024-10-15

To upgrade replace the `stalwart-mail` binary. 

### Added
- Data store CLI.

### Changed

### Fixed
- Tokenizer performance issue (#863)
- Incorrect AI model endpoint setting.

## [0.10.4] - 2024-10-08

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin. 

### Added
- Detect and ban port scanners as well as other forms of abuse (#820).
- ACME External Account Binding support (#379).

### Changed
- The settings `server.fail2ban.*` have been moved to `server.auto-ban.*`.
- The event `security.brute-force-ban` is now `security.abuse-ban`.

### Fixed
- Do not send SPF failures reports to local domains.
- Allow `nonce` in OAuth code requests.
- Warn when there are errors migrating domains rather than aborting migration.

## [0.10.3] - 2024-10-07

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin. Enterprise users wishing to use the new LLM-powered spam filter should also upgrade the spam filter rules.

### Added
- AI-powered Spam filtering and Sieve scripting (Enterprise feature).

### Changed
- The untrusted Sieve interpreter now has the `vnd.stalwart.expressions` extension enabled by default. This allows Sieve users to use the `eval` function to evaluate expressions in their scripts. If you would like to disable this extension, you can do so by adding `vnd.stalwart.expressions` to `sieve.untrusted.disabled-capabilities`.

### Fixed
- S3-compatible backends: Retry on `5xx` errors.
- OIDC: Include `nonce` parameter in `id_token` response.

## [0.10.2] - 2024-10-02

To upgrade first upgrade the webadmin and then replace the `stalwart-mail` binary. If you read these instructions too late, you can upgrade to the latest web-admin using `curl -k -u admin:yourpass https://yourserver/api/update/webadmin`.

### Added
- OpenID Connect server (#298).
- OpenID Connect backend support (Enterprise feature).
- OpenID Connect Dynamic Client Registration (#4)
- OAuth 2.0 Dynamic Client Registration Protocol ([RFC7591](https://datatracker.ietf.org/doc/html/rfc7591)) (#136)
- OAuth 2.0 Token Introspection ([RFC7662](https://datatracker.ietf.org/doc/html/rfc7662)).
- Contact form submission handling.
- `webadmin.path` setting to override unpack directory (#792).

### Changed

### Fixed
- Missing `LIST-STATUS` from RFC5819 in IMAP capability responses (#816).
- Do not allow tenant domains to be deleted if they have members (#812).
- Tenant principal limits (#810).

## [0.10.1] - 2024-09-26

To upgrade replace the `stalwart-mail` binary.

### Added
- `OAUTHBEARER` SASL support in all services (#627).

### Changed

### Fixed
- Fixed `migrate_directory` range scan (#784).

## [0.10.0] - 2024-09-21

This version includes breaking changes to how accounts are stored. Please read [UPGRADING.md](UPGRADING.md) for details.

### Added
- Multi-tenancy (Enterprise feature).
- Branding (Enterprise feature).
- Roles and permissions.
- Full-text search re-indexing.
- Partial database backups (#497).

### Changed

### Fixed
- IMAP `IDLE` support for command pipelining, aka the Apple Mail iOS 18 bug (#765).
- Case insensitive INBOX `fileinto` (#763).
- Properly decode undelete account name (#761).

## [0.9.4] - 2024-09-09

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- Support for global Sieve scripts that can be used by users to filter their incoming mail.
- Allow localhost to override HTTP access controls to prevent lockouts.

### Changed
- Sieve runtime error default log level is now `debug`.

### Fixed
- Ignore INBOX case on Sieve's `fileinto` (#725)
- Local keys parsing and retrieval issues.
- Lookup reload does not include database settings.
- Account count is incorrect.

## [0.9.3] - 2024-08-29

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- Dashboard (Enterprise feature)
- Alerts (Enterprise feature)
- SYN Flood (session "loitering") attack protection (#482)
- Mailbox brute force protection (#688)
- Mail from is allowed (`session.mail.is-allowed`) expression (#609)

### Changed
- `authentication.fail2ban` setting renamed to `server.fail2ban.authentication`.
- Added elapsed times to message filtering events.

### Fixed
- Include queueId in MTA Hooks (#708)
- Do not insert empty keywords in FTS index.

## [0.9.2] - 2024-08-21

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- Message delivery history (Enterprise feature)
- Live tracing and logging (Enterprise feature)
- SQL Read Replicas (Enterprise feature)
- Distributed S3 Blob Store (Enterprise feature)

### Changed

### Fixed
- Autodiscover request parser issues.
- Do not create tables when using SQL as an external directory (fixes #291)
- Do not hardcode logger id (fixes #348)
- Include `Forwarded-For IP` address in `http.request-url` event (fixes #682)

## [0.9.1] - 2024-08-08

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- Metrics support (closes #478)
  - OpenTelemetry Push Exporter
  - Prometheus Pull Exporter (closes #275)
- HTTP endpoint access controls (closes #266 #329 #542)
- Add `options` setting to PostgreSQL driver (closes #662)
- Add `isActive` property to defaults on Sieve/get JMAP method (closes #624)

### Changed
- Perform `must-match-sender` checks after sender rewriting (closes #394)
- Only perform email ingest duplicate check on the target mailbox (closes #632)

### Fixed
- Properly parse `Forwarded` and `X-Forwarded-For` headers (fixes #669)
- Resolve DKIM macros when generating DNS records (fixes #666)
- Fixed `is_local_domain` Sieve function (fixes #622)

## [0.9.0] - 2024-08-01

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin. This version includes breaking changes to the Webhooks configuration and produces a slightly different log output, read [UPGRADING.md](UPGRADING.md) for details.

### Added
- Improved and faster tracing and logging.
- Customizable event logging levels.

### Changed

### Fixed
- ManageSieve: Return capabilities after successful `STARTTLS`
- Do not provide `{auth_authen}` Milter macro unless the user is authenticated

## [0.8.5] - 2024-07-07

To upgrade replace the `stalwart-mail` binary.

### Added
- Restore deleted e-mails (Enterprise Edition only)
- Kubernetes (K8S) livenessProbe and readinessProbe endpoints.

### Changed
- Avoid sending reports for DMARC/delivery reports (#173)

### Fixed
- Refresh old FoundationDB read transactions (#520)
- Subscribing shared mailboxes doesn't work (#251)

## [0.8.4] - 2024-07-03

To upgrade replace the `stalwart-mail` binary.

### Added

### Changed

### Fixed
- Fix TOTP validation order.
- Increase Jemalloc page size on armv7 builds.

## [0.8.3] - 2024-07-01

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin.

### Added
- Two-factor authentication with Time-based One-Time Passwords (#436)
- Application passwords (#479).
- Option to disable user accounts.

### Changed
- DANE success on EndEntity match regardless of TrustAnchor validation.

### Fixed
- Fix ManageSieve GETSCRIPT response: Add missing CRLF (#563)
- Do not return CAPABILITIES after ManageSieve AUTH=PLAIN SASL exchange (#548)
- POP3 QUIT must write a response (#568)

## [0.8.2] - 2024-06-22

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin and spam filter versions.

### Added
- Webhooks support (#480)
- MTA Hooks (like milter but over HTTP)
- Manually train and test spam classifier (#473 #264 #257 #471)
- Allow configuring default mailbox names, roles and subscriptions (#125 #290 #458 #498)
- Include `robots.txt` (#542)

### Changed
- Milter support on all SMTP stages (#183)
- Do not announce `STARTTLS` if the listener does not support it.

### Fixed
- Incoming reports stored in the wrong subspace (#543)
- Return `OK` after a successful ManageSieve SASL authentication flow (#187)
- Case-insensitive search in settings API (#487)
- Fix `session.rcpt.script` default variable name (#502)

## [0.8.1] - 2024-05-23

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin and spam filter versions.

### Added
- POP3 support.
- DKIM signature length exploit protection.
- Faster email deletion.
- Junk/Trash folder auto-expunge and changelog auto-expiry (#403)
- IP allowlists.
- HTTP Strict Transport Security option.
- Add TLS Reporting DNS entry (#464).

### Changed
- Use separate account for master user.
- Include server hostname in SMTP greetings (#448).

### Fixed
- IP addresses trigger `R_SUSPICIOUS_URL` false positive (#461 #419).
- JMAP identities should not return null signatures.
- Include authentication headers and check queue quotas on Sieve message forwards.
- ARC seal using just one signature.
- Remove technical subdomains from MTA-STS policies and TLS records (#429).

## [0.8.0] - 2024-05-13

This version uses a different database layout which is incompatible with previous versions. Please read the [UPGRADING.md](UPGRADING.md) file for more information on how to upgrade from previous versions.

### Added
- Clustering support with node auto-discovery and partition-tolerant failure detection.
- Autoconfig and MS Autodiscover support (#336)
- New variables `retry_num`, `notify_num`, `last_error` add `last_status` available in queue expressions.
- Performance improvements, in particular for FoundationDB.
- Improved full-text indexing with lower disk space usage.
- MTA-STS policy management.
- TLSA Records generation for DANE (#397)
- Queued message visualization from the web-admin.
- Master user support.

### Changed
- Make `certificate.*` local keys by default.
- Removed `server.run-as.*` settings.
- Add Microsoft Office Macro types to bad mime types (#391)

### Fixed
- mySQL TLS support (#415)
- Resolve file macros after dropping root privileges.
- Updated order of SPF Records (#395).
- Avoid duplicate accountIds when using case insensitive external directories (#399)
- `authenticated_as` variable not usable for must-match-sender (#372)
- Remove `StandardOutput`, `StandardError` in service (#390)
- SMTP `AUTH=LOGIN` compatibility issues with Microsoft Outlook (#400)

## [0.7.3] - 2024-05-01

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin version.

### Added
- Full database export and import functionality
- Add --help and --version command line arguments (#365)
- Allow catch-all addresses when validating must match sender

### Changed
- Add `groupOfUniqueNames` to the list of LDAP object classes

### Fixed
- Trim spaces in DNS-01 ACME secrets (#382)
- Allow only one journald tracer (#375)
- `authenticated_as` variable not usable for must-match-sender (#372)
- Fixed `BOGUS_ENCRYPTED_AND_TEXT` spam filter rule
- Fixed parsing of IPv6 DNS server addresses

## [0.7.2] - 2024-04-17

To upgrade replace the `stalwart-mail` binary and then upgrade to the latest web-admin version.

### Added
- Support for `DNS-01` and `HTTP-01` ACME challenges (#226)
- Configurable external resources (#355)

### Changed

### Fixed
- Startup failure when Elasticsearch is down/starting up (#334)
- URL decode path elements in REST API.

## [0.7.1] - 2024-04-12

To upgrade replace the `stalwart-mail` binary.

### Added
- Make initial admin password configurable via env (#311)

### Changed
- WebAdmin download URL.

### Fixed
- Remove ASN.1 DER structure from DKIM ED25519 public keys.
- Filter out invalid timestamps on log entries.

## [0.7.0] - 2024-04-09

This version uses a different database layout and introduces multiple breaking changes in the configuration files. Please read the [UPGRADING.md](UPGRADING.md) file for more information on how to upgrade from previous versions.

### Added
- Web-based administration interface.
- REST API for management and configuration.
- Automatic RSA and ED25519 DKIM key generation.
- Support for compressing binaries in the blob store (#227).
- Improved performance accessing IMAP mailboxes with a large number of messages.
- Support for custom DNS resolvers.
- Support for multiple loggers with different levels and outputs.

### Changed

### Fixed
- Store quotas as `u64` rather than `u32`.
- Second IDLE connections disconnects the first one (#280).
- Use relaxed DNS parsing, allowing underscores in DNS labels (#172).
- Escape regexes within `matches()` expressions (#155).
- ManageSieve LOGOUT should reply with `OK` instead of `BYE`.

## [0.6.0] - 2024-02-14

This version introduces breaking changes in the configuration file. Please read the [UPGRADING.md](UPGRADING.md) file for more information on how to upgrade from previous versions.

### Added
- Distributed and fault-tolerant SMTP message queues.
- Distributed rate-limiting and fail2ban.
- Expressions in configuration files.

### Changed

### Fixed
- Do not include `STATUS` in IMAP `NOOP` responses (#234).
- Allow multiple SMTP `HELO` commands.
- Redirect OAuth using a `301` instead of a `307` code.

## [0.5.3] - 2024-01-14

Please read the [UPGRADING.md](UPGRADING.md) file for more information on how to upgrade from previous versions.

### Added
- Built-in [fail2ban](https://stalw.art/docs/server/fail2ban) and IP address/mask blocking (#164).
- CLI: Read URL and credentials from environment variables (#88).
- mySQL driver: Add `max-allowed-packet` setting (#201).

### Changed
- Unified storage settings for all services (read the [UPGRADING.md](UPGRADING.md) for details)

### Fixed
- IMAP retrieval of auto-encrypted emails (#203).
- mySQL driver: Parse `timeout.wait` property as duration (#202).
- `X-Forwarded-For` header on JMAP Rate-Limit does not work (#208).
- Use timeouts in install script (#138).

## [0.5.2] - 2024-01-07

Please read the [UPGRADING.md](UPGRADING.md) file for more information on how to upgrade from previous versions.

### Added
- [ACME](https://stalw.art/docs/server/tls/acme) support for automatic TLS certificate generation and renewal (#160).
- TLS certificate [hot-reloading](https://stalw.art/docs/management/database/maintenance#tls-certificate-reloading).
- [HAProxy protocol](https://stalw.art/docs/server/proxy) support (#36).

### Changed

### Fixed
- IMAP command `SEARCH <seqnum>` is using UIDs rather than sequence numbers.
- IMAP responses to `APPEND` and `EXPUNGE` should include `HIGHESTMODSEQ` when `CONDSTORE` is enabled.

## [0.5.1] - 2024-01-02

### Added
- SMTP smuggling protection: Sanitization of outgoing messages that do not use `CRLF` as line endings.
- SMTP sender validation for authenticated users: Added the `session.auth.must-match-sender` configuration option to enforce that the sender address used in the `MAIL FROM` command matches the authenticated user or any of their associated e-mail addresses.

### Changed

### Fixed
- Invalid DKIM signatures for empty message bodies.
- IMAP command `SEARCH BEFORE` is not properly parsed.
- IMAP command `FETCH` fails to parse single arguments without parentheses.
- IMAP command `ENABLE QRESYNC` should also enable `CONDSTORE` extension.
- IMAP response to `ENABLE` command does not include enabled capabilities list.
- IMAP response to `FETCH ENVELOPE` should not return `NIL` when the `From` header is missing.

## [0.5.0] - 2023-12-27

This version requires a database migration and introduces breaking changes in the configuration file. Please read the [UPGRADING.md](UPGRADING.md) file for more information.

### Added
- Performance enhancements:
  - Messages are parsed only once and their offsets stored in the database, which avoids having to parse them on every `FETCH` request.
  - Background full-text indexing.
  - Optimization of database access functions.
- Storage layer improvements:
  - In addition to `FoundationDB` and `SQLite`, now it is also possible to use `RocksDB`, `PostgreSQL` and `mySQL` as a storage backend.
  - Blobs can now be stored in any of the supported data stores, it is no longer limited to the file system or S3/MinIO. 
  - Full-text searching con now be done internally or delegated to `ElasticSearch`.
  - Spam databases can now be stored in any of the supported data stores or `Redis`. It is no longer necessary to have an SQL server to use the spam filter.
- Internal directory: 
  - User account, groups and mailing lists can now be managed directly from Stalwart without the need of an external LDAP or SQL directory.
  - HTTP API to manage users, groups, domains and mailing lists.
- IMAP4rev1 `Recent` flag support, which improves compatibility with old IMAP clients.
- LDAP bind authentication, to support some LDAP servers such as `lldap` which do not expose the userPassword attribute.
- Messages marked a spam by the spam filter can now be automatically moved to the account's `Junk Mail` folder.
- Automatic creation of JMAP identities.

### Changed

### Fixed
- Spamhaus DNSBL return codes.
- CLI tool reports authentication errors rather than a parsing error.

## [0.4.2] - 2023-11-01

### Added
- JMAP for Quotas support ([RFC9425](https://www.rfc-editor.org/rfc/rfc9425.html))
- JMAP Blob Management Extension support ([RFC9404](https://www.rfc-editor.org/rfc/rfc9404.html))
- Spam Filter - Empty header rules.

### Changed

### Fixed
- Daylight savings time support for crontabs.
- JMAP `oldState` doesn’t reflect in `*/changes` (#56)

## [0.4.1] - 2023-10-26

### Added

### Changed

### Fixed
- Dockerfile entrypoint script.
- `bayes_is_balanced` function.

## [0.4.0] - 2023-10-25

This version introduces some breaking changes in the configuration file. Please read the [UPGRADING.md](UPGRADING.md) file for more information.

### Added
- Built-in Spam and Phishing filter.
- Scheduled queries on some directory types.
- In-memory maps and lists containing glob or regex patterns.
- Remote retrieval of in-memory list/maps with fallback mechanisms.
- Macros and support for including files from TOML config files.

### Changed
- `config.toml` is now split in multiple TOML files for better organization.
- **BREAKING:** Configuration key prefix `jmap.sieve` (JMAP Sieve Interpreter) has been renamed to `sieve.untrusted`.
- **BREAKING:** Configuration key prefix `sieve` (SMTP Sieve Interpreter) has been renamed to `sieve.trusted`.

### Fixed

## [0.3.10] - 2023-10-17

### Added
- Option to allow invalid certificates on outbound SMTP connections.
- Option to disable ansi colors on `stdout`.

### Changed
- SMTP reject messages are now logged as `info` rather than `debug`.

### Fixed

## [0.3.9] - 2023-10-07

### Added
- Support for reading environment variables from the configuration file using the `!ENV_VAR_NAME` special keyword.
- Option to disable ANSI color codes in logs.

### Changed
- Querying directories from a Sieve script is now done using the `query()` method from `eval`. Your scripts will need to be updated, please refer to the [new syntax](https://stalw.art/docs/smtp/filter/sieve#directory-queries).

### Fixed
- IPrev lookups of IPv4 mapped to IPv6 addresses.

## [0.3.8] - 2023-09-19

### Added
- Journal logging support
- IMAP support for UTF8 APPEND

### Changed
- Replaced `rpgp` with `sequoia-pgp` due to rpgp bug.

### Fixed
- Fix: IMAP folders that contain a & can't be used (#90) 
- Fix: Ignore empty lines in IMAP requests

## [0.3.7] - 2023-09-05

### Added
- Option to disable IMAP All Messages folder (#68).
- Option to allow unencrypted SMTP AUTH (#72)
- Support for `rcpt-domain` key in `rcpt.relay` SMTP rule evaluation.

### Changed
 
### Fixed
- SMTP strategy `Ipv6thenIpv4` returns only IPv6 addresses (#70)
- Invalid IMAP `FETCH` responses for non-UTF-8 messages (#70)
- Allow `STATUS` and `ACL` IMAP operations on virtual mailboxes.
- IMAP `SELECT QRESYNC` without specifying a UID causes panic (#67)
- Milter `DATA` command is sent after headers which causes ClamAV to hang.
- Sieve `redirect` of unmodified messages does not work.

## [0.3.6] - 2023-08-29

### Added
- Arithmetic and logical expression evaluation in Sieve scripts.
- Support for storing query results in Sieve variables.
- Results of SPF, DKIM, ARC, DMARC and IPREV checks available as environment variables in Sieve scripts.
- Configurable protocol flags for Milter filters.
- Fall-back to plain text when `STARTTLS` fails and `starttls` is set to `optional`.

### Changed
 
### Fixed
- Do not panic when `hash = 0` in reports. (#60)
- JMAP Session resource returns `EmailSubmission` capabilities using arrays rather than objects.
- ManageSieve `PUTSCRIPT` should replace existing scripts.

## [0.3.5] - 2023-08-18

### Added
- TCP listener option `nodelay`.
 
### Changed
 
### Fixed
- SMTP: Allow disabling `STARTTLS`.
- JMAP: Support for `OPTIONS` HTTP method.

## [0.3.4] - 2023-08-09

### Added
- JMAP: Support for setting custom HTTP response headers (#52)
 
### Changed
 
### Fixed
- SMTP: Missing envelope keys in rewrite rules (#25) 
- SMTP: Remove CRLF from Milter headers
- JMAP/IMAP: Successful authentication requests should not count when rate limiting
- IMAP: Case insensitive Inbox selection
- IMAP: Automatically create Inbox for group accounts

## [0.3.3] - 2023-08-02

### Added
- Encryption at rest with **S/MIME** or **OpenPGP**.
- Support for referencing context variables from dynamic values.
 
### Changed
 
### Fixed
- Support for PKCS8v1 ED25519 keys (#20).
- Automatic retry for import/export blob downloads (#14)

## [0.3.2] - 2023-07-28

### Added
- Sender and recipient address rewriting using regular expressions and sieve scripts.
- Subaddressing and catch-all addresses using regular expressions (#10).
- Dynamic variables in SMTP rules.
 
### Changed
- Added CLI to Docker container (#19).
 
### Fixed
- Workaround for a bug in `sqlx` that caused SQL time-outs (#15).
- Support for ED25519 certificates in PEM files (#20). 
- Better handling of concurrent IMAP UID map modifications (#17).
- LDAP domain lookups from SMTP rules.

## [0.3.1] - 2023-07-22

### Added
- Milter filter support.
- Match IP address type using /0 mask (#16).
 
### Changed
 
### Fixed
- Support for OpenLDAP password hashing schemes between curly brackets (#8). 
- Add CA certificates to Docker runtime (#5).

## [0.3.0] - 2023-07-16

### Added
- **LDAP** and **SQL** authentication.
- **subaddressing** and **catch-all** addresses.
- **S3-compatible** storage.

### Changed
- Merged the `stalwart-jmap`, `stalwart-imap` and `stalwart-smtp` repositories into
  `stalwart-mail`.
- Removed clustering module and replaced it with a **FoundationDB** backend option.
- Integrated Stalwart SMTP into Stalwart JMAP.
- Rewritten JMAP protocol parser.
- Rewritten store backend.
- Rewritten IMAP server to have direct access to the message store (no more IMAP proxy).
- Replaced `actix` with `hyper`.
 
### Fixed

