Stalwart Mail — One-Click Install

Stalwart Mail server

Stalwart is a scalable, secure and robust open-source mail server software designed for the 21st century.

Admin Password

See Log in to the web interface to know how to get the admin password.

Screenshots

Features

Stalwart Mail Server is an open-source mail server solution with JMAP, IMAP4, and SMTP support and a wide range of modern features. It is written in Rust and designed to be secure, fast, robust and scalable.

Key features:

• JMAP server:
  • JMAP Core (RFC 8620)
  • JMAP Mail (RFC 8621)
  • JMAP for Sieve Scripts (DRAFT-SIEVE-19)
  • JMAP over WebSocket (RFC 8887), JMAP Blob Management (RFC 9404) and JMAP for Quotas (RFC 9425) extensions.
• IMAP4 server:
  • IMAP4rev2 (RFC 9051) full compliance.
  • IMAP4rev1 (RFC 3501) backwards compatible.
  • ManageSieve (RFC 5804) server.
  • Numerous extensions supported.
• SMTP server:
  • Built-in DMARC, DKIM, SPF and ARC support for message authentication.
  • Strong transport security through DANE, MTA-STS and SMTP TLS reporting.
  • Inbound throttling and filtering with granular configuration rules, sieve scripting and milter integration.
  • Distributed virtual queues with delayed delivery, priority delivery, quotas, routing rules and throttling support.
  • Envelope rewriting and message modification.
• Spam and Phishing filter:
  • Comprehensive set of filtering rules on par with popular solutions.
  • Statistical spam classifier with automatic training capabilities.
  • DNS Blocklists (DNSBLs) checking of IP addresses, domains, and hashes.
  • Collaborative digest-based spam filtering with Pyzor.
  • Phishing protection against homographic URL attacks, sender spoofing and other techniques.
  • Trusted reply tracking to recognize and prioritize genuine e-mail replies.
  • Sender reputation monitoring by IP address, ASN, domain and email address.
  • Greylisting to temporarily defer unknown senders.
  • Spam traps to set up decoy email addresses that catch and analyze spam.
• Flexible and scalable:
  • Pluggable storage backends with RocksDB, FoundationDB, PostgreSQL, mySQL, SQLite, S3-Compatible, Redis and ElasticSearch support.
  • Built-in, LDAP or SQL authentication backend support.
  • Full-text search available in 17 languages.
  • Disk quotas.
  • Sieve scripting language with support for all registered extensions.
  • Email aliases, mailing lists, subaddressing and catch-all addresses support.
  • Integration with OpenTelemetry to enable monitoring, tracing, and performance analysis.
• Web-based administration:
  • Account, domain, group and mailing list management.
  • SMTP queue management for messages and outbound DMARC and TLS reports.
  • Report visualization interface for received DMARC, TLS-RPT and Failure (ARF) reports.
  • Configuration of every aspect of the mail server.
  • Log viewer with search and filtering capabilities.
  • Self-service portal for password reset and encryption-at-rest key management.
• Secure and robust:
  • Encryption at rest with S/MIME or OpenPGP.
  • Automatic TLS certificate provisioning with ACME.
  • OAuth 2.0 authorization code and device authorization flows.
  • Automated blocking of hosts that cause multiple authentication errors (aka fail2ban).
  • Access Control Lists (ACLs).
  • Rate limiting.
  • Security audited (read the report).
  • Memory safe (thanks to Rust).