listmonk

listmonk is a self-hosted mailing list manager and newsletter platform designed for high performance and simple operations. It provides a web UI and APIs to manage subscribers, lists, and campaigns, backed by PostgreSQL for scalable storage and querying.

Key Features

• Subscriber management with custom attributes/fields and import/export (e.g., CSV)
• List and segment-based targeting using PostgreSQL queries for flexible filtering
• Campaign creation with HTML templates, previews, and personalization variables
• Transactional email and newsletter sending via SMTP and third-party email gateways
• Bounce handling and basic list hygiene workflows (depending on mail setup)
• Built-in admin web UI plus REST-style APIs for automation and integrations
• Metrics/reporting for campaigns (opens/clicks) via tracking mechanisms

Use Cases

• Send periodic newsletters to product users, communities, or customers
• Run segmented email campaigns (e.g., onboarding, announcements) from internal data
• Operate a privacy-controlled mailing system for organizations that can’t use SaaS

Limitations and Considerations

• Deliverability, bounce processing, and reputation management depend heavily on your SMTP/provider configuration
• Email template building is developer-oriented compared to drag-and-drop marketing suites

listmonk is a solid fit for teams that want a fast, PostgreSQL-driven newsletter system with a clean UI and automatable APIs. It focuses on dependable list and campaign operations rather than heavyweight marketing-automation features.