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
- IMAP4 server
- SMTP server
- Flexible: LDAP directory
... [More] and SQL database authentication, Full-text search available in 17 languages, Integration with OpenTelemetry to enable monitoring, tracing, and performance analysis.
- Secure: Encryption at rest with S/MIME or OpenPGP, OAuth 2.0 authorization code and device authorization flows, Access Control Lists (ACLs), Rate limiting.
- Robust and scalable: FoundationDB or SQLite database backends, S3-compatible blob storage support, Memory safe (thanks to Rust). [Less]
An open-source IMAP server designed to be secure, fast, robust and scalable. JMAP Stalwart is required to use it.
Key features:
- IMAP4 and ManageSieve server: IMAP4rev2 (RFC 9051) full compliance, IMAP4rev1 (RFC 3501) backwards compatible, ManageSieve (RFC 5804) server with support for all
... [More] extensions.
- Support Access Control Lists (ACL) (RFC 4314), Conditional Store and Quick Resynchronization (RFC 7162), SORT and THREAD (RFC 5256), Message Preview Generation (RFC 8970).
- Proxies IMAP4 and ManageSieve requests to JMAP requests, High-availability and fault-tolerance support when using a Stalwart JMAP backend, Full support for JMAP Core, JMAP Mail and JMAP for Sieve Scripts.
- OAuth 2.0 authorization code and device authorization flows, Rate limiting, Memory safe. [Less]
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