# WorkOS: Email delivery delays

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-06-04 23:22 UTC · Resolved: 2026-06-05 00:49 UTC · Duration: 1.4 h
- Updates: 4 · Affected components: AuthKit, Core Services - AuthKit
- [Vendor status page: https://stspg.io/2lzgdfg3zq47](https://stspg.io/2lzgdfg3zq47)
- [Company: WorkOS](https://rewindex.com/company/workos.md)

## Summary

WorkOS reported a major AuthKit email-delivery degradation affecting customers without custom domains due to an upstream provider issue. It started 2026-06-04 23:22 UTC and resolved 2026-06-05 00:49 UTC, lasting 1 h 26 min; the provider scaled up backlog processing, and all queued messages were sent. _(machine-written, sol)_
## Timeline of updates

- **identified** 2026-06-04 23:22 UTC: Email delivery for customers without custom domains is delayed due to an issue with our upstream service provider.
- **identified** 2026-06-05 00:08 UTC: Our email provider is continuing to work through the backlog and has scaled up to speed up the process.
- **monitoring** 2026-06-05 00:34 UTC: Email delivery has recovered. We're continuing to monitor.
- **resolved** 2026-06-05 00:49 UTC: The backlog of messages have been sent and system performance has returned to its expected state. Sending delays occurred between 2:50pm – 5:18pm PT.

## Rewindex changes for this incident

- 2026-06-04 23:22 UTC: [Major incident: Email delivery delays](https://rewindex.com/change/i0cb279f7c3d62f.md)


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Canonical: https://rewindex.com/company/workos/incidents/v7m6h2r7m41d · Markdown: https://rewindex.com/company/workos/incidents/v7m6h2r7m41d.md · JSON: https://rewindex.com/api/v1/companies/workos/incidents/v7m6h2r7m41d · Generated 2026-10-18T10:38:00.441Z