v0.16.9

OpenMOSS/MOSS-TTS-Nanov0.16.9Jun 16, 2026by github-actions[bot]

AI Summary

The Stalwart email server update focuses on ACME certificate management and fixes critical leaks in JMAP and Sieve functionality.

Key Highlights

Added preferred certificate chain support for ACME
Fixed JMAP `*/changes` methods leaking object IDs
Fixed Sieve to reject invalid certificates in `http_header`
Fixed FoundationDB read version cache expiration
Added freshness check for ACME certificate renewal

New Features

Preferred certificate chain specification for ACME

Full Release Notes

## [0.16.9] - 2026-06-15

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](https://github.com/stalwartlabs/stalwart/blob/main/UPGRADING/v0_16.md) for more information on how to upgrade from previous versions.

## Added
- ACME: Allow specifying a preferred certificate chain.

## Changed

## Fixed
- JMAP: `*/changes` methods leak ids of non-shared objects (reported by @5ud0er).
- Sieve: Do not allow invalid certs in `http_header` function.
- FoundationDB: Fix read version cache expiration logic.
- MTA: Re-scheduling or editing a queued message reports success but persists nothing for recipients in a non-`default` virtual queue.
- CardDAV: Version requests included in `address-data` are ignored.
- ACME: Add freshness check when renewing certificates.
- Autodiscover v2: Read email address from query parameters.
- Sieve: Do not keep copies of redirected messages when `keep` is not specified.
- Registry: Object ids are parsed as numbers.


<hr />

### Check binary attestation [here](https://github.com/stalwartlabs/stalwart/attestations/31329451)