# Mailgun: Sending errors in US

- Impact (vendor’s label): major
- Status: resolved
- Started: 2025-09-12 10:07 UTC · Resolved: 2025-09-12 15:21 UTC · Duration: 5.3 h
- Updates: 10 · Affected components: Email Services - Outbound Delivery, API, Email Services - API
- [Vendor status page: https://stspg.io/8jcggcjc48kz](https://stspg.io/8jcggcjc48kz)
- [Company: Mailgun](https://rewindex.com/company/mailgun.md)

## Summary

Mailgun reported a major incident causing sending errors in US regions, affecting API, Email Services - API, and Email Services - Outbound Delivery. It began at 2025-09-12 10:07 UTC and was resolved at 2025-09-12 15:21 UTC, lasting 5 h 14 min. A fix was implemented, and all systems were operating normally at resolution. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2025-09-12 10:07 UTC: We are currently investigating reports of sending errors in US regions.
- **investigating** 2025-09-12 10:28 UTC: We are continuing to investigate this issue.
- **investigating** 2025-09-12 10:49 UTC: We are continuing to investigate this issue.
- **investigating** 2025-09-12 11:14 UTC: We are continuing to investigate this issue.
- **monitoring** 2025-09-12 12:03 UTC: A fix has been implemented and we are monitoring the results.
- **identified** 2025-09-12 12:57 UTC: We are continuing to work to stabilize things at this time. We have no ETA.
- **identified** 2025-09-12 13:42 UTC: Error rates are normalizing as we continue to work to fix the issue.
- **monitoring** 2025-09-12 13:57 UTC: A fix has been implemented and we are monitoring the results.
- **monitoring** 2025-09-12 14:48 UTC: Systems have normalized, we are continuing to monitor for any issues.
- **resolved** 2025-09-12 15:21 UTC: All systems are operating normally at this time. Our engineers continue to monitor our systems for any recurrence or new issues.

## Rewindex changes for this incident

- 2025-09-12 10:07 UTC: [Major incident: Sending errors in US](https://rewindex.com/change/i324c79f5257633.md)


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Canonical: https://rewindex.com/company/mailgun/incidents/zqyxry16x7qb · Markdown: https://rewindex.com/company/mailgun/incidents/zqyxry16x7qb.md · JSON: https://rewindex.com/api/v1/companies/mailgun/incidents/zqyxry16x7qb · Generated 2026-10-18T09:55:41.613Z