Mailu is a complete email distribution system deployed as a suite of containerized images. It provides a self-hosted email infrastructure that integrates a webmail client interface with a centralized administration dashboard for managing domains, user accounts, and storage quotas.
The system focuses on email deliverability and security through a framework that implements identity verification records and digital certificates. This includes the use of identity signatures and encryption to secure mail transport and prevent domain spoofing.
The platform includes layered spam and malware filtering using greylisting and auto-learning engines. It further manages email traffic through rule-based routing, aliases, and user-level configurations for automated responses and server-side filtering.