stalwart

v0.16.11 Feature

This release adds 3 notable features for engineering teams evaluating rollout.

Published 1mo Communication & Email

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✓ No known CVEs patched

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✓ No known CVEs patched in this version

Topics

caldav carddav imap jmap mail pop3

+4 more

rust server smtp webdav

Affected surfaces

crypto_tls deps

Summary

AI summary

Updates https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md, Encryption-at-rest, and S3 across a mixed release.

Full changelog

[0.16.11] - 2026-06-25

If you are upgrading from v0.16.x, replace the binary (or run docker pull). If you are upgrading from v0.15.x and below, please read the upgrading documentation for more information on how to upgrade from previous versions.

Added

Encryption-at-rest: Support for AES-256-GCM and ChaCha20-Poly1305 for S/MIME (#161).
S3: Support for allowInvalidCerts option to allow connecting to S3 endpoints with invalid TLS certificates.
Redis Sentinel support as an in-memory store and cluster coordinator backend (#2430).

Changed

Fixed

DANE: Verify DNSSEC is supported by the resolver before attempting to validate TLSA records.
TLS: Update search index when file-backed certificates are refreshed.
JMAP: Principal/query returns broad results when a name or email filter cannot be resolved.
Webhooks: event IDs collide for same event type emitted in the same second.

Check binary attestation here

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About stalwart

All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

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