# Mailgun: Elevated 401 errors in US Region

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-03-19 18:43 UTC · Resolved: 2026-03-19 18:53 UTC · Duration: 10 min
- Updates: 2 · Affected components: API, Email Services - API
- [Vendor status page: https://stspg.io/64kxkfp1nmhb](https://stspg.io/64kxkfp1nmhb)
- [Company: Mailgun](https://rewindex.com/company/mailgun.md)

## Summary

Mailgun reported a major incident affecting API and Email Services - API in the US region, where some requests incorrectly failed with 401 errors. It started at 2026-03-19 18:43 UTC and lasted 10 min, resolving at 2026-03-19 18:53 UTC after a fix was deployed and systems returned to normal. _(machine-written, sol)_
## Timeline of updates

- **identified** 2026-03-19 18:43 UTC: Some requests may be incorrectly failing with 401 error codes in our US region.
- **resolved** 2026-03-19 18:53 UTC: A fix has been deployed and systems are back to normal.

## Rewindex changes for this incident

- 2026-03-19 18:43 UTC: [Major incident: Elevated 401 errors in US Region](https://rewindex.com/change/i38dbf4997c92d8.md)


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Canonical: https://rewindex.com/company/mailgun/incidents/8w4q85qhsmgt · Markdown: https://rewindex.com/company/mailgun/incidents/8w4q85qhsmgt.md · JSON: https://rewindex.com/api/v1/companies/mailgun/incidents/8w4q85qhsmgt · Generated 2026-10-18T11:46:06.969Z