Changes / Mailgun / Click and Open Tracking Degraded (US Regions)
Mailgun: Major incident: Click and Open Tracking Degraded (US Regions)
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 from the diff below (Sol; type: incident security). Check the diff before relying on it.
Major incidentLabel: security (model (Jev), 26%)Changed Detected Source: stspg.io (opens in new tab)
What changed
Before: not present
After: Click and Open Tracking Degraded (US Regions)
Before: not present
After: major
Before: not present
After: resolved
Before: not present
After: 2026-08-11 05:32 UTC
Before: not present
After: 2026-08-11 07:07 UTC
Before: not present
After: Email Services - Events & Logs, Events & Logs
Before: not present
After: 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.
Before: not present
After: The issue has been identified and a fix is being implemented.
Before: not present
After: A fix has been implemented and we are monitoring the results.
Before: not present
After: This incident has been resolved.
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: Click and Open Tracking Degraded (US Regions) (this change) 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. | Major incident |