Mailing List Server
Mailing List Server is a app in the osFoundry community catalog. Full-featured mailing list manager — list subscriptions, web archives, moderation, bounce processing, message filtering, MIME-aware, multilingual. Powered by GNU Mailman 3 (Core + Postorius web admin + HyperKitty archives). Ships as a self-contained all-in-one image bundling Mailman 3 (Python), PostgreSQL, and Postfix as the MTA.
Details
- Workspace: osfoundry
- Category: COMMUNICATION
- Pricing: Free
- Access: Community
Features
- Full-featured mailing list manager — list subscriptions
- Web archives
- Moderation
- Bounce processing
- Message filtering
- MIME-aware
Documentation
# Mailing List Server
Full-featured mailing list, powered by GNU Mailman 3.
## Three components bundled
- **Mailman Core** — the engine that processes incoming mail + sends list messages
- **Postorius** — the web admin UI for list owners + members
- **HyperKitty** — the web archive (browse old messages)
## ⚠️ Mail deliverability + port 25
Mailman is an **MTA-side** service — it needs to send + receive email. Port 25 is required. **Cloud infrastructure providers commonly block outbound port 25** (DigitalOcean, AWS, GCP). For production deployments:
- Use a relay smarthost (configure Postfix to relay through SendGrid / Postmark / Amazon SES)
- Request port 25 unblock from your provider (rarely granted)
- Run on a UDP/TCP-permissive host
This is the same caveat as the Postal Transactional Email API (#83).
## Packaging
All-in-one build: Mailman Core + Postorius (Django) + HyperKitty (Django) + bundled PostgreSQL + Postfix MTA. Heavy stack — Mailman 3's normal compose has 5+ images. **2 TCP ports** (80 web + 25 SMTP).
How to use Mailing List Server in osFoundry
Install Mailing List Server into your workspace in one click, then fork it in osStudio to customise the prompts, tools, or configuration for your stack. Anyone in your workspace can pick up where you left off.
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