Resolved after 6 hours 42 minutes, affecting Mail Flow, on February 4, 2026.
On Wednesday, February 4, 2026, from approximately 15:30 to 16:00 \(UTC\), some US users experienced email delivery delays in the Defend product. This issue was caused by a brief networking fluctuation, resulting in email delivery delays of up to 10 minutes during the affected period. Once the cloud environment returned to healthy operating levels, Defend returned to normal performance, and all delayed emails were delivered by 16:00 \(UTC\). No data loss occurred as a result of this issue.
Affected components
Update timeline
- investigating Feb 04, 2026, 04:17 PM UTC
We are currently investigating an issue with inbound email delivery delay
- monitoring Feb 04, 2026, 04:34 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Feb 04, 2026, 11:00 PM UTC
This incident has been resolved.
- postmortem Feb 06, 2026, 04:29 PM UTC
On Wednesday, February 4, 2026, from approximately 15:30 to 16:00 \(UTC\), some US users experienced email delivery delays in the Defend product. This issue was caused by a brief networking fluctuation, resulting in email delivery delays of up to 10 minutes during the affected period. Once the cloud environment returned to healthy operating levels, Defend returned to normal performance, and all delayed emails were delivered by 16:00 \(UTC\). No data loss occurred as a result of this issue.
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