BillionMail is an open-source mail server and email marketing platform that combines SMTP functionality with newsletter and campaign management capabilities, fully self-hosted and free from subscription fees.
The tool addresses the problem of expensive or closed-source email marketing solutions by providing a self-contained system where users retain complete control over their email infrastructure and data. It integrates established mail server components with a web-based interface for managing campaigns, contacts, and analytics. The platform includes webmail access through RoundCube and provides DNS management tools for domain verification and SSL certificate handling.
Organizations should consider BillionMail if they want to avoid recurring costs associated with commercial email marketing platforms, need to keep email data on their own infrastructure for privacy or compliance reasons, or prefer open-source software without vendor lock-in. The tool suits businesses and individuals managing newsletters, promotional campaigns, or transactional emails at scale. The project is designed for straightforward deployment, with installation documented as taking approximately eight minutes and support for Docker-based installation as well as one-click setup through aaPanel.
The project maintains active engagement with its user base, with nearly all open issues originating from external adopters rather than the core team, indicating substantial real-world usage. Maintainers typically respond to new issues and pull requests within a day. Work tracked in the issue system centers on questions from users, bug reports, and enhancement requests.
