Outage in SparkPost
Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)
Resolved MinorIncident Report
Summary AI Generated
SparkPost's US-hosted SMTP delivery experienced elevated latency for approximately 1.1 hours, affecting outbound message delivery for some customers. EU-hosted customers were unaffected. The issue was identified, a fix was implemented, and delivery recovered fully upon resolution.
We are investigating an increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the EU.)
Components affected
SparkPost SMTP Delivery - USATrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
12 days ago - at 10/28/2026 08:37PM
This incident has been resolved.
MONITORING
12 days ago - at 10/28/2026 08:37PM
A fix was implemented and we are seeing sustained delivery recovery.
IDENTIFIED
12 days ago - at 10/28/2026 08:03PM
We are continuing to work on a fix for this issue.
MONITORING
12 days ago - at 10/28/2026 08:00PM
A fix has been implemented and we are monitoring the results.
IDENTIFIED
12 days ago - at 10/28/2026 07:48PM
The issue has been identified and a fix is being implemented.
INVESTIGATING
12 days ago - at 10/28/2026 07:37PM
We are investigating an increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the EU.)
Latest SparkPost outages
Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only) - 10 days ago
Mail delivery delays - about 1 month ago
Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only) - about 2 months ago
Health Score and Cohort data is delayed - about 2 months ago
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