Changes / WorkOS / Email delivery delays
WorkOS: Major incident: Email delivery delays
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 from the diff below (Sol; type: incident degradation). Check the diff before relying on it.
Major incidentLabel: degradation (model (Jev), 100%)Changed Detected Source: stspg.io (opens in new tab)
What changed
Before: not present
After: Email delivery delays
Before: not present
After: major
Before: not present
After: resolved
Before: not present
After: 2026-06-04 23:22 UTC
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After: 2026-06-05 00:49 UTC
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After: AuthKit, Core Services - AuthKit
Before: not present
After: Email delivery for customers without custom domains is delayed due to an issue with our upstream service provider.
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After: Our email provider is continuing to work through the backlog and has scaled up to speed up the process.
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After: Email delivery has recovered. We're continuing to monitor.
Before: not present
After: 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.
First version of this incident archived by Rewindex. View the live incident (opens in new tab).
History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Major incident: Email delivery delays (this change) 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. | Major incident |