---
title: "hMailServer release history: every 6.x version, with dates"
url: https://www.hmailserver.co.uk/topic/28216/hmailserver-release-history-every-6.x-version-with-dates
author: "Progressiverobot"
published: 2026-09-23T06:17:01.118Z
updated: 2026-09-23T06:17:01.135Z
category: "Announcements & releases"
tags: ["release"]
site: hMailServer Community Forum
---

# hMailServer release history: every 6.x version, with dates

Every hMailServer 6 release, newest first, with the date it was signed or built and a link to its announcement on this forum. Each is on [GitLab](https://gitlab.com/hmailserver/hmailserver/-/releases) with its notes and its files, and since 18 October 2026 on the [GitHub mirror](https://github.com/RainbowWizard-coder/hMailServer/releases) as well - but for 6.2.0 and 6.0.0-B4, whose files were not preserved - with Sigstore bundles from 6.2.19 to 6.3.3 and from 6.3.5 on, and SBOMs from 6.2.3 on and for the five earlier releases that carry an installer. 6.3.4 carries no Sigstore bundle: its checksums are in a file signed with the release tags' SSH key. From 6.3.4 the installer and each package have an SBOM of their own; from 6.3.5 the bundles are made by the project's GitLab pipeline for the release's tag. https://updates.progressiverobot.com/download/ always leads to the newest stable release.

The current release is **hMailServer 6.3.8**, released 2 November 2026.

## Releases (38)

| Version | Released | What changed |
|---|---|---|
| [6.3.8](/topic/28278/hmailserver-6.3.8-security-fixes-for-every-earlier-version-read-before-upgrading-and-a-helm-chart-that-starts-a-server) | 2 November 2026 | Security fixes for every earlier version, read before upgrading, and a Helm chart that starts a server |
| [6.3.7](/topic/28277/hmailserver-6.3.7-security-fixes-for-every-earlier-version-read-before-upgrading-and-the-first-security-release-of-the-pause) | 17 October 2026 | Security fixes for every earlier version, read before upgrading, and the first security release of the pause |
| [6.3.6](/topic/28276/hmailserver-6.3.6-security-fixes-for-every-earlier-version-read-before-upgrading-and-the-last-release-for-the-time-being) | 6 October 2026 | Security fixes for every earlier version, read before upgrading, and the last release for the time being |
| [6.3.5](/topic/28275/hmailserver-6.3.5-the-first-release-built-and-signed-by-its-gitlab-pipeline-and-the-quarantine-grouped-by-domain-and-helo) | 29 September 2026 | The first release built and signed by its GitLab pipeline, and the quarantine grouped by domain and HELO |
| [6.3.4](/topic/28218/hmailserver-6.3.4-a-password-could-run-code-on-windows-servers-with-jscript-scripting) | 27 September 2026 | A password could run code on Windows servers with JScript scripting |
| [6.3.3](/topic/28183/hmailserver-6.3.3-outbound-bdat-stalled-every-message-over-60-000-bytes) | 15 September 2026 | Outbound BDAT stalled every message over 60,000 bytes |
| [6.3.2](/topic/28180/hmailserver-6.3.2-a-public-resolver-made-surbl-tag-every-message-with-a-link-as-spam) | 13 September 2026 | A public resolver made SURBL tag every message with a link as spam |
| [6.3.1](/topic/28179/hmailserver-6.3.1-the-installer-is-signed-and-updaterequireauthenticode-works) | 11 September 2026 | The installer is signed, and UpdateRequireAuthenticode works |
| [6.3.0](/topic/28184/hmailserver-6.3.0-the-server-runs-on-linux-but-not-with-per-domain-dkim-signing) | 10 September 2026 | The server runs on Linux, but not with per-domain DKIM signing |
| [6.2.28](/topic/28178/hmailserver-6.2.28-the-server-can-verify-and-apply-its-own-updates) | 8 September 2026 | The server can verify and apply its own updates |
| [6.2.27](/topic/28181/hmailserver-6.2.27-a-stripped-ds-record-turned-a-signed-zone-unsigned) | 7 September 2026 | A stripped DS record turned a signed zone unsigned |
| [6.2.26](/topic/28167/hmailserver-6.2.26-sql-server-compact-upgrades-to-schema-6030-reported-as-failed) | 6 September 2026 | SQL Server Compact upgrades to schema 6030 reported as failed |
| [6.2.25](/topic/28173/hmailserver-6.2.25-acme-issuance-and-renewal-terminated-the-server-process) | 6 September 2026 | ACME issuance and renewal terminated the server process |
| [6.2.24](/topic/28170/hmailserver-6.2.24-delegated-imap-move-could-destroy-the-only-copy-of-a-message) | 4 September 2026 | Delegated IMAP MOVE could destroy the only copy of a message |
| [6.2.21](/topic/28165/hmailserver-6.2.21-inbound-mail-from-a-postfix-relay-could-hang-forever) | 16 August 2026 | Inbound mail from a Postfix relay could hang forever |
| [6.2.20](/topic/28169/hmailserver-6.2.20-fresh-installs-failed-and-silent-installs-hung-on-a-dialog) | 15 August 2026 | Fresh installs failed and silent installs hung on a dialog |
| [6.2.19](/topic/28177/hmailserver-6.2.19-custom-dns-server-broke-every-lookup-since-6.2.16) | 15 August 2026 | Custom DNS server broke every lookup since 6.2.16 |
| [6.2.18](/topic/28166/hmailserver-6.2.18-a-stalled-database-bounced-valid-mail-instead-of-retrying-it) | 12 August 2026 | A stalled database bounced valid mail instead of retrying it |
| [6.2.17](/topic/28171/hmailserver-6.2.17-relayed-mail-could-stall-after-end-of-data-with-no-250) | 12 August 2026 | Relayed mail could stall after end-of-data with no 250 |
| [6.2.16](/topic/28200/hmailserver-6.2.16-an-error-dialog-on-closing-the-ctrl-k-settings-palette) | 11 August 2026 | An error dialog on closing the Ctrl+K settings palette |
| [6.2.15](/topic/28207/hmailserver-6.2.15-imap-sequence-sets-and-a-restore-that-could-empty-the-data-directory) | 11 August 2026 | IMAP sequence sets, and a restore that could empty the data directory |
| [6.2.14](/topic/28205/hmailserver-6.2.14-imap-append-reported-success-for-mail-it-never-wrote) | 11 August 2026 | IMAP APPEND reported success for mail it never wrote |
| [6.2.13](/topic/28204/hmailserver-6.2.13-a-data-stall-on-relayed-mail) | 11 August 2026 | A DATA stall on relayed mail |
| [6.2.12](/topic/28206/hmailserver-6.2.12-every-c-component-now-targets-.net-8) | 10 August 2026 | Every C# component now targets .NET 8 |
| [6.2.11](/topic/28208/hmailserver-6.2.11-two-control-panel-lists-read-their-class-name-to-screen-readers) | 7 August 2026 | Two Control Panel lists read their class name to screen readers |
| [6.2.10](/topic/28201/hmailserver-6.2.10-the-com-api-reported-success-on-calls-it-refused) | 7 August 2026 | The COM API reported success on calls it refused |
| [6.2.9](/topic/28198/hmailserver-6.2.9-the-dashboard-charts-that-rendered-white) | 7 August 2026 | The dashboard charts that rendered white |
| [6.2.8](/topic/28202/hmailserver-6.2.8-blank-list-editors-and-a-control-panel-that-died-on-restart) | 7 August 2026 | Blank list editors and a Control Panel that died on restart |
| [6.2.7](/topic/28195/hmailserver-6.2.7-file-pickers-and-one-click-dkim-in-the-control-panel) | 15 June 2026 | File pickers and one-click DKIM in the Control Panel |
| [6.2.6](/topic/28199/hmailserver-6.2.6-imap4rev2-as-an-opt-in-mode-and-a-control-panel-redesign) | 15 June 2026 | IMAP4rev2 as an opt-in mode, and a Control Panel redesign |
| [6.2.5](/topic/28197/hmailserver-6.2.5-default-installs-could-not-connect-to-their-own-database) | 15 June 2026 | Default installs could not connect to their own database |
| [6.2.4](/topic/28203/hmailserver-6.2.4-active-directory-account-pickers-in-the-control-panel) | 15 June 2026 | Active Directory account pickers in the Control Panel |
| [6.2.3](/topic/28196/hmailserver-6.2.3-sieve-and-managesieve-filtering) | 15 June 2026 | Sieve and ManageSieve filtering |
| [6.2.2](/topic/28215/hmailserver-6.2.2-rfc-4013-saslprep-and-a-substantially-upgraded-control-panel) | 14 June 2026 | RFC 4013 SASLprep and a substantially upgraded Control Panel |
| [6.2.1](/topic/28214/hmailserver-6.2.1-pipelining-smtputf8-dsn-and-srs) | 14 June 2026 | PIPELINING, SMTPUTF8, DSN and SRS |
| [6.2.0](/topic/28209/hmailserver-6.2.0-the-new-control-panel-desktop-administration-app) | 14 June 2026 | The new Control Panel desktop administration app |
| [6.1.0](/topic/28210/hmailserver-6.1.0-the-web-control-deck-and-a-light-dark-administrator) | 12 June 2026 | The Web Control Deck and a light/dark Administrator |
| [6.0.0](/topic/28213/hmailserver-6.0.0-the-modernised-baseline-and-the-build-4-installer-fix) | 12 June 2026 | The modernised baseline, and the build 4 installer fix |

## Pre-releases (8)

These were test builds. Everything in them shipped in a later release, and none of them should be installed today.

| Version | Released | What changed |
|---|---|---|
| [6.2.23-alpha2](/topic/28172/hmailserver-6.2.23-alpha2-thunderbird-could-not-save-a-single-sent-copy) | 4 September 2026 | Thunderbird could not save a single Sent copy |
| [6.2.23-alpha1](/topic/28175/hmailserver-6.2.23-alpha1-local-delivery-could-lose-a-message-after-answering-250) | 21 August 2026 | Local delivery could lose a message after answering 250 |
| [6.2.22-pre6](/topic/28182/hmailserver-6.2.22-pre6-pre4-was-withdrawn-a-fresh-install-listened-on-nothing) | 20 August 2026 | Pre4 was withdrawn, a fresh install listened on nothing |
| [6.2.22-pre3](/topic/28176/hmailserver-6.2.22-pre3-the-server-now-enforces-per-account-2fa-and-app-passwords) | 19 August 2026 | The server now enforces per-account 2FA and app passwords |
| [6.2.22-pre2](/topic/28174/hmailserver-6.2.22-pre2-dmarc-aggregate-reports-rua-are-now-sent-not-just-consumed) | 18 August 2026 | DMARC aggregate reports (rua) are now sent, not just consumed |
| [6.2.22-pre1](/topic/28168/hmailserver-6.2.22-pre1-the-built-in-acme-client-never-worked-with-let-s-encrypt) | 16 August 2026 | The built-in ACME client never worked with Let's Encrypt |
| [6.0.0-B4](/topic/28212/hmailserver-6.0.0-b4-fixes-the-startup-crash-from-the-bundled-vc-runtime) | 12 June 2026 | Fixes the startup crash from the bundled VC++ runtime |
| [6.0.0-B1](/topic/28211/hmailserver-6.0.0-b1-first-regression-validated-build-of-the-modernised-6.0-line) | 12 June 2026 | First regression-validated build of the modernised 6.0 line |