WorkOS: Degraded Email Delivery to Microsoft Outlook Inboxes
Affected components: AuthKitCore Services - AuthKit
Timeline of updates
- monitoring
We are experiencing degraded delivery of outbound emails from WorkOS to Outlook and Microsoft 365 inboxes. Some messages may be delayed or not delivered. Delivery to non-Outlook providers is unaffected. We are monitoring the situation and will share updates as they become available.
- resolved
The issue impacting outbound email delivery to Outlook and Microsoft 365 inboxes has been resolved. Delivery is now operating normally across all providers.
Archive proof
Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert. That proves this record existed by then and has not been changed since, by anyone, Rewindex included.
How the archive is checked, and what it cannot prove.
First version captured
In the 2026-10-17 checkpoint, timestamped by FreeTSA and DigiCert on . Record hash
7e613fbfddc7d6b2…
Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab).
Cite this
Status incident (vendor impact label: minor) posted by WorkOS, started 2026-01-22 23:44 UTC, resolved after 16 h, 2 update(s).
- Title
- Degraded Email Delivery to Microsoft Outlook Inboxes
- Vendor
- WorkOS
- Date
- URL
- https://rewindex.com/company/workos/incidents/fnv3vmphcyhs
WorkOS profileRecent WorkOS incidentsAll outages on January 22, 2026WorkOS in January 2026MarkdownJSON