# Mailgun: Click and Open Tracking Degraded (US Regions)

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-08-11 05:32 UTC · Resolved: 2026-08-11 07:07 UTC · Duration: 1.6 h
- Updates: 4 · Affected components: Email Services - Events & Logs, Events & Logs
- [Vendor status page: https://stspg.io/tsnvwtt2nr90](https://stspg.io/tsnvwtt2nr90)
- [Company: Mailgun](https://rewindex.com/company/mailgun.md)

## Summary

Mailgun reported a major denial-of-service attack against click and open tracking servers in US regions, causing some requests to time out or fail. The incident started at 2026-08-11 05:32 UTC and was resolved at 2026-08-11 07:07 UTC, lasting 1 h 35 min; a fix was implemented by 06:54 UTC. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-08-11 05:32 UTC: We are currently experiencing a denial of service attack against our click and open tracking servers in our US regions. Remediation work is underway. Some requests may time out or fail at this time.
- **identified** 2026-08-11 05:32 UTC: The issue has been identified and a fix is being implemented.
- **monitoring** 2026-08-11 06:54 UTC: A fix has been implemented and we are monitoring the results.
- **resolved** 2026-08-11 07:07 UTC: This incident has been resolved.

## Rewindex changes for this incident

- 2026-08-11 05:32 UTC: [Major incident: Click and Open Tracking Degraded (US Regions)](https://rewindex.com/change/if1ddedb11d1e67.md)


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Canonical: https://rewindex.com/company/mailgun/incidents/6p1nck5w4300 · Markdown: https://rewindex.com/company/mailgun/incidents/6p1nck5w4300.md · JSON: https://rewindex.com/api/v1/companies/mailgun/incidents/6p1nck5w4300 · Generated 2026-10-18T11:45:48.527Z