SparkPost experienced a minor incident on December 11, 2025 affecting SMTP Delivery - USA and SMTP Delivery - EUROPE, lasting 1h 59m. The incident has been resolved; the full update timeline is below.
Affected components
SMTP Delivery - USASMTP Delivery - EUROPE
Update timeline
- investigating Dec 11, 2025, 04:34 PM UTC
Messages that have failed initial delivery and are in a delayed state are taking longer than expected to resend. Only messages injected via SMTP and in a delayed state are effected.
- identified Dec 11, 2025, 04:57 PM UTC
The issue has been identified and the fix has been deployed.
- monitoring Dec 11, 2025, 05:00 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Dec 11, 2025, 06:34 PM UTC
This incident has been resolved.