Minor incident
SparkPost: Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)
Oct 28, 2026, 19:37 UTC
started
20:37 UTC
resolved
1 h 01 min
duration
Affected: SMTP Delivery - USA
Current status of SparkPost: Operational — live SparkPost status
Timeline
- Oct 28, 2026, 19:37 UTCinvestigatingWe are investigating an increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the EU.)
- Oct 28, 2026, 19:48 UTCidentifiedThe issue has been identified and a fix is being implemented.
- Oct 28, 2026, 20:00 UTCmonitoringA fix has been implemented and we are monitoring the results.
- Oct 28, 2026, 20:03 UTCidentifiedWe are continuing to work on a fix for this issue.
- Oct 28, 2026, 20:37 UTCmonitoringA fix was implemented and we are seeing sustained delivery recovery.
- Oct 28, 2026, 20:37 UTCresolvedThis incident has been resolved.
Updates as published by SparkPost (original).
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