Billion Mail

Billion Mail is an open-source, self-hosted mail server and email marketing platform designed for sending newsletters, promotional content, and transactional messages. By providing a full SMTP solution, it allows users to maintain complete control over their email delivery infrastructure without relying on third-party proprietary services.

The software is deployed as a server application and can be installed via a shell script or Docker. It provides a web interface for campaign management and integrates RoundCube for webmail access via a dedicated directory. Users manage the system through a web dashboard or a command line management script, which handles updates, displays default login information, and shows required DNS records for domain verification.

Key features

• Tracking for email delivery, open rates, and click-through rates
• Support for custom professional marketing templates
• Integrated RoundCube webmail access
• DNS record verification and automatic SSL enablement
• Management script for updates and system information
• Customer management and list tagging
• Unlimited email sending without vendor restrictions

The platform is designed for businesses and individuals who require full control over their email infrastructure and data privacy. It removes third-party tracking by hosting all data on the user's own server, ensuring that customer lists and campaign metrics remain private. The installation process is designed for speed, supporting standard Linux environments, Docker Compose, and one-click deployment via aaPanel. The system architecture focuses on reducing the friction between server setup and the first successful email send by automating SSL and DNS guidance.

Billion Mail serves as a complete SMTP solution for users seeking an independent email marketing stack that avoids monthly fees and vendor lock-in.