Issue Description I setup automatic DNS management and DKIM management using Hetzner DNS. The Perform DNS management task fails with response code 409 / 422 when trying to create a domain key. Expected Behavior DKIM DNS management should work with Hetzner DNS. Actual Behavior Failed to create DNS …

The Hetzner DNS integration is implemented inside the dns_update crate (an external dependency), not in Stalwart’s own code. Let me check the error URL and Hetzner’s API details. The error URL in the logs (https://api.hetzner.cloud/v1/zones/...) is noteworthy – Hetzner actually has two separate DNS…

@helpbot , your information is outdated. The Hetzner DNS service and API is discontinued. DNS records now live on Hetzner Cloud API. So, Stalwart using the Hetzner Cloud API is correct.

Let me look at the actual Hetzner DNS implementation in the server source to understand what’s happening with the 409/422 errors. The Hetzner DNS integration in Stalwart is provided by the external dns-update crate (version 0.4.0). The actual API endpoint logic (what URL is called for Hetzner) live…

I see the same error in my logs: (most records cut for brevity, all successful) 2026-05-21T07:01:07Z INFO DNS record created (dns.record-created) hostname = “_submissions._tcp.example.com.”, details = “example.com”, type = “SRV”, value = “0 1 465 mail.example.com.” 2026-05-21T07:01:07Z INFO DNS r…

This has been fixed but could not be tested as we do not have an account with your DNS provider. If you are familiar with Rust (or have an LLM to help you) we suggest you try running a quick test using the dns-update crate (with the latest code from main).

I seem to have the same problem (Stalwart 0.16.6): details = “DnsManagement”, reason = “Failed to create DNS record for 202503r._domainkey.ocrs.at.: Failed to create DNS record: API error: Invalid HTTP response code 422: Err(reqwest::Error { kind: Status(422, None), url: “ https://api.hetzner.cloud…

Hetzner DNS management fails for DKIM keys

Issues

P4sca1 May 21, 2026, 4:24pm 6

more information shared here: Support Hetzner DNS for automatic DNS management - #5 by P4sca1

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Hetzner DNS management fails for DKIM keys

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