Postorius

Self-Hosted

Open-source web interface for Mailman3 mailing lists

Overview

Postorius is a user-friendly open-source web interface for managing Mailman3 mailing lists. It enables admins to configure list settings (subscriptions, moderation rules, email templates) and users to subscribe/unsubscribe, update preferences, or access archives. Deployable via Docker, pip, or as part of a Mailman3 stack (with HyperKitty for archives), it integrates seamlessly with Mailman Core. Supports role-based access control, multi-language options, and customizable branding. Ideal for self-hosted communities/organizations needing full control over their mailing list infrastructure without third-party reliance.

Self-Hosting Resources

Find Official Image on Docker Hub View Source & Docs

Below is a reference structure for docker-compose.yml. ⚠️ Do NOT run blindly. Replace placeholders with official values.

docker-compose.template.yml TEMPLATE


version: '3'
services:
  postorius:
    image: <OFFICIAL_IMAGE_NAME>:latest
    container_name: postorius
    ports:
      - "8080:<APP_INTERNAL_PORT>"
    volumes:
      - ./data:/app/data
    restart: unless-stopped

Key Features

Web-based management for Mailman3 mailing lists
Role-based access control (admin, moderator, user)
Subscription/unsubscription and preference management
Moderation rule and email template configuration
Multi-language support and customizable branding

Frequently Asked Questions

? Is Postorius hard to install?

Installation difficulty varies: Docker Compose (as part of the Mailman3 stack) simplifies deployment, but manual setup (via pip) requires configuring Django, Mailman Core integration, and database connections. Official docs provide step-by-step guides for both options.

? Is it a good alternative to proprietary mailing list interfaces?

Yes—if you prioritize self-hosted control and privacy. It excels at list management but lacks some SaaS features like drag-and-drop newsletter builders. Ideal for communities/organizations needing full ownership of their mailing list data.

? Is it completely free?

Absolutely! Postorius is open-source under the GPLv3 license, so it’s free to use, modify, and self-host. There are no subscription fees or paid tiers.

Top Alternatives

Mailchimp (Proprietary) Search Google

Constant Contact (Proprietary) Search Google

SendGrid Mailing Lists (Proprietary) Search Google

Tool Info

Pricing Free/Open Source

Category Communication - Email - Mailing Lists and Newsletters

Platform Self-Hosted

Pros

⊕ Fully open-source (GPLv3 license) with no costs
⊕ Seamless integration with Mailman3 Core
⊕ Privacy-focused (self-hosted control over data)
⊕ Customizable to match organizational branding

Cons

⊖ Requires Mailman3 Core to function (not standalone)
⊖ Technical setup needed for initial deployment
⊖ Lacks SaaS-style drag-and-drop newsletter builders
⊖ Limited to Mailman3 ecosystem (no other list manager support)