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MSH Postfix Milter Release History

Track our product's evolution and improvements

v1.1.0 - Feature Release

Released: July 22, 2026

Settings export and import, stored attachments, five additional policy rule actions, autoresponder attachments, and many improvements and fixes.

New features

Settings export and import

The administrator now has a dedicated Settings node in the tree. From there you can export the complete server configuration - rules, templates, stored attachments, directory service configuration and more - into a single ZIP archive, and import it back later. You choose which sections to include on both export and import, and every import automatically creates a backup of the current settings. 🔗

Stored attachments

A new Attachments node in the admin tree acts as a central store for files you want to work with in rules. Together with it, the Add attachment policy rule action lets a rule attach a stored file to processed messages. In the Rules Tester the attachment is simulated, on the server the real file is attached. 🔗

More policy rule actions

The following rule actions are available again, rebuilt on the current engine:

  • New message - sends a new message from a rule, with a Recipients tab, a body template chosen via the Select dialog, and its own Attachments tab. Sends both HTML and plain-text versions. 🔗
  • Forward message - forwards the processed message. Recipients can be picked from the user list, and an optional separator line can be placed above the forwarded content. 🔗
  • Strip attachments - removes attachments and inserts an information template into the message body. 🔗
  • Save attachments - stores message attachments into a configured directory. 🔗
  • Run executable - runs a configured program for matching messages. 🔗

Autoresponder improvements

  • Autoreplies can include attachments - both stored attachments and files from a server path - via a new Attachments tab in the wizard.
  • An optional reply separator line (for example "On <date> <sender> wrote:") can be placed above the quoted original message.
  • HTML autoreplies are now sent as proper HTML plus plain-text alternatives, and replies to text-only messages get a correctly built HTML body as well.

User photo in templates

  • The {photo} variable accepts size arguments: {photo:200} (width), {photo:200x100} (width and height), {photo:x100} (height only).
  • A new {photoData} variable inserts the raw image data URI, so template authors can write their own img tag around it.
  • The image format (JPEG, PNG, GIF) is detected automatically from the photo data.

Rules Tester

  • Test messages are saved locally per server, so they survive restarting the administrator.
  • A new Actions menu offers Delete and Delete All for test messages.
  • The tester is now strictly simulation-only: it does not write attachments to disk and does not run executables, it only reports what would happen.

Template designer

Template content can be converted between the HTML and text panels in the designer.

Configuration and connectivity

  • The SMTP host and connection timeouts used for sending are configurable through MAIL_SMTP_* entries in the launcher configuration.
  • Connecting to a server no longer blocks the administrator window - a loading dialog is shown while the connection is established.

Online help

Help buttons were added across the application (Settings, Attachments, Demo Mode, Run Executable and more), opening the matching page of the online documentation. Documentation links now use HTTPS and point to the documentation version matching the installed application version.

Changes

  • Scheduler: custom schedule entries now match when any entry applies (OR) instead of requiring all of them at once (AND).
  • Directory services: loading from OpenLDAP, Active Directory or a manual import now writes clear progress information to the logs - connection steps, searches and the number of loaded users, groups and domains.
  • Template preview: images honor their size settings. Width and height attributes, px values and inline CSS sizing are applied, so the preview matches what mail clients will show.
  • Diagnostic logs: replaced variable values in the message processing trace are shortened to 512 characters, so embedded photos no longer flood the logs with image data.
  • Conditions: sender and recipient condition fields hint that multiple values can be separated with semicolons.
  • Attachments list: the dialog is resizable instead of a fixed size.
  • License: uploading a license key file was streamlined.

Fixes

  • An inactive policy rule no longer stops the processing of the rules after it.
  • "Database is locked" errors during the scheduled directory service synchronization were eliminated - the cache database now uses write-ahead logging and writes changes in batches.
  • Messages sent by the server (autoreplies, forwarded and new messages) keep all their headers - previously some headers could be lost while the message was prepared for sending.
  • The user photo is no longer embedded into plain-text message bodies as raw image data.
  • The Run executable action keeps merge fields that contain spaces together as a single argument.
  • Attachment file name lists inserted per line into HTML templates keep their line breaks.
  • The Save attachments action creates missing target directories and resolves file name collisions instead of failing.
  • Reply and compose windows in the Rules Tester show embedded images instead of broken image placeholders.
  • The Demo Mode license is written correctly on a fresh installation where the settings directory does not exist yet.

v1.0.0 - First Stable Release

Released: May 07, 2026

First stable release with all core features implemented.

Key Features:

  • Server module for integration with Postfix mail server
  • Administrator panel for Windows, macOS, and Linux
  • Policy rules - block messages, rewrite subjects, manage recipients, add and remove headers
  • Signature rules - append email signatures based on sender, recipient, direction, and other conditions
  • Disclaimer rules - automatically add legal disclaimers or footers to outgoing messages
  • Autoresponder rules - send automatic replies based on configurable conditions
  • Template designer - create rich HTML email templates with attribute placeholders
  • Directory service integration - import users and groups from Active Directory, OpenLDAP, or CSV files
  • Access control - restrict Administrator Panel access with username and password authentication
  • Rules tester - simulate mail flow and verify rule behaviour without sending real emails
  • Diagnostic logging - trace message processing with configurable retention and sender filters
  • Events history - review a log of all processed messages and applied rules