Maddy is a mail server that provides SMTP, IMAP, and related email services in a single composable application.
The project addresses the complexity of running email infrastructure by combining multiple mail server functions into one unified system. Rather than deploying separate components for SMTP relay, IMAP access, and authentication, maddy integrates these capabilities with support for DKIM, DMARC, and SPF authentication protocols. The composable architecture allows operators to enable or disable modules based on their specific needs, reducing unnecessary overhead for simpler deployments while supporting full-featured setups.
Maddy suits operators who want to self-host email without managing multiple interdependent services. It works well for small to medium deployments where simplicity and maintainability matter more than scaling to massive user bases. The all-in-one approach eliminates coordination problems between separate SMTP and IMAP daemons and reduces the configuration surface area compared to traditional mail server stacks. Those evaluating alternatives should note that the README does not position maddy against other mail servers by name, so direct comparisons to established options are not documented in the project itself.
The project shows consistent maintenance with regular commits addressing bugs and features. Pull requests receive timely review and feedback from maintainers. The codebase demonstrates active refinement of the configuration system and protocol implementations. Issue discussions indicate engagement with user problems and feature requests, though some issues remain open for extended periods. The project maintains documentation through its homepage and README, though the depth of certain operational topics varies.
