v0.16.4

stalwartlabs/stalwartv0.16.4May 5, 2026by github-actions[bot]

AI Summary

Maintenance update enabling live tracing and fixing pagination, JMAP, and spam filtering logic.

Key Highlights

Enabled live tracing in community and OSS versions.
Fixed pagination by anchor for queued messages, tasks, and metrics.
Fixed JMAP references in nested objects and address book queries.
Fixed `mail-parser` panic with corrupted attachments.

Full Release Notes

## [0.16.4] - 2026-05-05

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

## Changed

## Fixed
- Live tracing in community and OSS versions.
- Timezone changes from the `AccountSettings` object return `invalidProperties`.
- `mail-parser` panic with certain messages containing corrupted attachments.
- Pagination by anchor for queued messages, tasks and metrics.
- Spam filter: Use original instead of rewritten `RCPT` on checks.
- JMAP:
  - References in nested objects not resolved.
  - `AddressBook/query` fetches wrong resources.
- Import tool fails to restore registry entries.
- FDB: Allow multiple FoundationDB instances in the same process.
- Autoconfig: Return `%EMAILADDRESS%` when no email address is provided.
- Quota: Include Sieve scripts in quota recalculations.


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### Check binary attestation [here](https://github.com/stalwartlabs/stalwart/attestations/26459606)