Outage report · Partial outage
Zendesk outage on Sep 21, 2026
Outbound email delivery failures to some mail providers
SeverityPartial outage
StartedSep 21, 2026, 07:50UTC
ResolvedSep 21, 2026, 14:30UTC
Duration6h 40m
What happened
Zendesk reported a partial outage starting Sep 21, 2026, 07:50 UTC, affecting Support, Email. It was marked resolved at Sep 21, 2026, 14:30 UTC.
- The incident lasted 6h 40m from first report to resolution.
- It was the longest significant outage Zendesk reported in the 12 months up to it.
- Zendesk had reported 6 other partial or major outages in the 90 days before it.
- 6 other vendors we track reported a significant incident within 12 hours of it.
What our independent monitoring saw
Our independent monitoring of Zendesk started after this incident, so this report is based on Zendesk's status page.
Other outages around the same time
Significant incidents other vendors reported within 12 hours of this one.
Zendesk's overall reliability
51.7/100
Zendesk has a reliability score of 51.7/100, with 98.85% effective uptime and 13 incidents over the last 90 days.
Visit Zendesk ↗Full Zendesk reliability report and live status → · Most reliable Zendesk alternatives →
Get Zendesk outage alerts
We'll email you when Zendesk reports a partial or major outage, and when it's fixed. Free, and you can stop any time.