Introduction to Stalwart Mail Server
Stalwart Mail Server is a comprehensive, secure, and modern all-in-one mail solution. It seamlessly combines traditional email protocols like IMAP, POP3, and SMTP with the modern JMAP protocol, offering a robust, open-source platform built using the Rust programming language for efficiency and safety. The server is designed to handle a variety of mailing tasks with speed and precision, making it an ideal choice for both small-scale implementations and large-scale deployments.
Key Features
1. Comprehensive Protocol Support
- JMAP, IMAP4, POP3, and ManageSieve: Stalwart Mail Server supports a wide range of protocols. JMAP allows for modern email communication with extensions for Sieve Scripting, WebSocket, Blob Management, and quotas. Enhanced IMAP and POP3 support provide extensive compatibility and flexibility. ManageSieve is also supported for managing Sieve scripts seamlessly.
2. SMTP Features
- Advanced Message Authentication: Integrates protocols like DMARC, DKIM, SPF, and ARC to ensure high-standard message authentication.
- Enhanced Security and Delivery Options: Implements important features like DANE, MTA-STS, and SMTP TLS reporting for secure transport, alongside granular delivery configurations and message modifications.
3. Spam and Phishing Protection
- Offers a robust spam and phishing filter utilizing both rule-based and AI-driven spam detection, integrated DNS blocklists, sender reputation management, greylisting, and more, effectively safeguarding users from unwanted emails and potential phishing attacks.
4. Scalability and Flexibility
- Boasts pluggable storage options supporting various databases like RocksDB, FoundationDB, PostgreSQL, Redis, and more, allowing the server to adapt to diverse infrastructural needs. It also supports clustering for failover and partition resilience.
5. Secure and User-Centric Design
- Emphasizes security with encryption for data at rest using S/MIME or OpenPGP and support for automatic TLS certificate provisioning. It offers features such as IP blocking against server attacks, two-factor authentication, and secure user authentication systems.
6. Observability and Administration
- Provides extensive logging and monitoring capabilities through OpenTelemetry, metrics integration with Prometheus, and administratively convenient web-based dashboard tools to manage accounts, groups, and queues effectively.
Getting Started
To start using the Stalwart Mail Server, users can install it on various platforms such as Linux, MacOS, Windows, or Docker. Detailed installation guides and other documentation are available to assist in setup and customization to fit specific needs.
Community and Support
The Stalwart Mail Server community offers various channels for support, including GitHub, Reddit, Discord, and Matrix. Users facing issues or having questions are encouraged to reach out. Additionally, premium support options are available for those needing prioritized assistance.
Sponsorship and Contributions
Sponsorship plays a crucial role in maintaining and improving Stalwart Mail Server. By supporting the project through the Open Collective platform, sponsors contribute to the ongoing development and gain benefits such as access to the Small Business Edition license.
Future Directions
The Stalwart team is committed to continuous improvement and expansion of their feature set, with plans to incorporate additional support for protocols such as CalDAV, CardDAV, and ActiveSync, as well as JMAP for Calendar, Contacts, and Tasks.
By deploying Stalwart Mail Server, organizations can count on a secure, reliable, and innovative mail solution that evolves with their needs.