Apache James
The modular, cloud-native enterprise mail server for high-performance messaging and data sovereignty.

The Open Source, Full-Featured Mail Server Solution for Enterprise Reliability and Data Sovereignty.
iRedMail is a comprehensive, open-source mail server solution designed to provide a secure, scalable, and easy-to-deploy alternative to proprietary email platforms like Microsoft Exchange or Google Workspace. In the 2026 market, iRedMail distinguishes itself through its architectural commitment to data sovereignty, allowing organizations to maintain absolute control over their communications. The system integrates industry-standard components—Postfix (MTA), Dovecot (IMAP/POP3), Nginx (Web Server), and SpamAssassin/ClamAV (Security)—into a unified deployment script. It supports multiple database backends, including OpenLDAP, MariaDB, PostgreSQL, and Microsoft Active Directory, making it highly adaptable for diverse enterprise environments. The 2026 roadmap emphasizes enhanced RESTful API capabilities for iRedAdmin-Pro and native support for modern container orchestration. By bundling essential services like webmail (Roundcube/SOGo), calendaring, and contact synchronization, iRedMail provides a 'zero-trust' capable infrastructure that satisfies GDPR, HIPAA, and other strict regulatory requirements. Its modular design ensures that organizations can scale from a handful of users to thousands without licensing fees per mailbox, positioning it as a top-tier cost-efficiency leader for technical infrastructure teams.
Supports OpenLDAP, MariaDB, PostgreSQL, and Active Directory as the user account backend.
The modular, cloud-native enterprise mail server for high-performance messaging and data sovereignty.
A high-scale, AI-optimized cloud email service designed for high deliverability and programmatic flexibility.
The open-source mail hosting and management platform for high-performance self-sovereignty.
The premier open-source, Docker-native mail server distribution for privacy-conscious organizations.
Verified feedback from the global deployment network.
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Bundles SpamAssassin, ClamAV, Amavisd-new, and Fail2ban with pre-configured rulesets.
A dedicated interface for end-users to manage their own passwords, white/blacklists, and mail forwarding.
Implementation of Postgrey to temporarily reject mail from unknown senders, forcing a retry.
Programmatic interface for domain, user, and alias management (Pro version).
Native support for SOGo to provide shared calendars, address books, and ActiveSync support.
Optional integration with dedicated archiving tools to store copies of all inbound/outbound traffic.
A firm needs to ensure no third-party (like Google or Microsoft) can index their sensitive internal communications.
Registry Updated:2/7/2026
An e-commerce platform needs to send millions of notification emails without paying 'per-email' fees to providers like SendGrid.
A web hosting provider wants to offer branded email accounts to their clients.