stalwartlabs/stalwart

Features

• Self-Hosted Email Delivery Platforms - Provides a complete self-hosted email infrastructure supporting SMTP, IMAP, and POP3 for private electronic messaging.
• Calendar and Contact Servers - Provides back-end synchronization for calendars and address books using CalDAV, CardDAV, and JMAP protocols.
• Collaboration Servers - Provides a comprehensive communication hub for shared calendars, contacts, and files via CalDAV, CardDAV, and WebDAV.
• Self-Hosted File Sync and Share Platforms - Stores and distributes files from a central location using fine-grained access controls via WebDAV and JMAP.
• Team Collaboration Suites - Enables the exchange of calendars, contacts, and files using standardized synchronization protocols for team coordination.
• Cluster Coordination - Synchronizes state and distributes workloads across multiple nodes using direct server communication for high availability.
• High Availability Clustering - Synchronizes state and assigns roles across multiple servers using peer-to-peer communication to ensure high availability.
• Sender Identity Verifications - Prevents spoofing by verifying senders via DMARC, DKIM, SPF, and ARC with automated key rotation.
• Mail Servers - Operates as an all-in-one email server supporting SMTP, IMAP, and JMAP for message delivery and retrieval.
• Mail Infrastructure Scalers - Coordinates server clusters to distribute email processing and storage for high availability and fault tolerance.
• Multi-Protocol - Provides full mail server capabilities implementing SMTP, IMAP, and POP3 protocols.
• Email Security Frameworks - Implements a full security suite utilizing SPF, DKIM, DMARC, and ARC to prevent sender spoofing.
• Email Sender Authentication - Validates message origin through a sequential pipeline of SPF, DKIM, ARC, and DMARC checks.
• Email Spam Filtering - Provides integrated spam and phishing protection using statistical classifiers, blocklists, and reputation monitoring.
• Mail Service Hosting - Hosts secure email services supporting standard retrieval protocols and integrated sender authentication.
• User Identity Management - Authenticates users through standard identity protocols including LDAP, SQL, OIDC, and OAuth.
• Multi-Protocol Servers - Unifies disparate communication standards like IMAP, JMAP, and CalDAV into a single integrated server core.
• Full-Text Search Indexes - Integrates storage engines with searchable indexes for fast retrieval of email and directory content.
• Full Text Search - Locates messages and files across multiple languages using full-text search backends.
• Object Storage Persistence - Offloads large objects and email bodies to S3-compatible storage for scalable distributed deployments.
• Pluggable Storage Drivers - Supports swapping different storage engines, including SQL databases, NoSQL stores, and object storage.
• Search & Indexing Engines - Creates search indexes for emails and directories using SQL or external search engines.
• S3-Compatible Storage Adapters - Saves email data and large objects to S3-compatible storage for use in distributed environments.
• Automated DNS Managers - Automatically manages MX, TXT, and CNAME records across various DNS providers to ensure service connectivity.
• Mail Routing Policies - Uses a specialized language and regular expressions to define dynamic email delivery rules and address rewriting.
• Expression-Based Routing - Rewrites sender and recipient addresses using regular expressions and dynamic variables to direct mail flow.
• Scriptable Delivery Rules - Applies delivery rules and modifies messages using a specialized scripting language for automated handling.
• Sieve Scripting - Executes custom Sieve scripts to automate the sorting and routing of emails based on complex logical expressions.
• Certificate Lifecycle Management - Automatically provisions and renews TLS certificates using ACME protocol challenges with DNS and HTTP.
• Data Encryption - Implements S/MIME and OpenPGP standards to ensure email messages are encrypted at rest.
• Email Encryption Gateways - Implements a secure mail system with built-in support for S/MIME and OpenPGP encryption.
• TLS Certificate Management - Automates the provisioning and renewal of TLS certificates using the ACME protocol with DNS and HTTP challenges.
• Identity and Access Management Servers - Provides centralized identity management with support for LDAP, SQL, OIDC, and OAuth.
• Automated Certificate Management - Implements automated lifecycle management for TLS certificates using the ACME protocol.
• Account Security Policies - Enforces security requirements including password strength, two-factor authentication, and application-specific credentials.
• Administrative Dashboards - Provides a web dashboard and REST API for managing server configurations, user accounts, and system health.

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