Mailgun change history: Click and Open Tracking Degraded (US Regions)

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.