Outage in SparkPost
Elevated percentage of API calls failing
Resolved MinorIncident Report
We are investigating an unexpected but small increase in the percentage of API calls failing since 01:30UTC. Approximately 0.015% of API calls are failing with a HTTP 504 (Gateway timeout) error. We will update this incident as we have more information.
Components affected
SparkPost Metrics API - USA SparkPost Events API - USA SparkPost Transmissions API - USA SparkPost Transmissions API - EUROPE SparkPost Metrics API - EUROPE SparkPost Sending Domains API - EUROPE SparkPost SMTP API - EUROPE SparkPost Events API - EUROPE SparkPost SMTP API - USA SparkPost Sending Domains API - USATrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
11 months ago - at 05/13/2025 11:29AM
After a period of extended monitoring, we have confirmed the remediation has completely resolved the issue. Requests and error rates have been normal since 06:27UTC
IDENTIFIED
11 months ago - at 05/13/2025 06:26AM
We have identified the cause as a set of stale IPs for an upstream service. We are now validating the approach for remediation.
INVESTIGATING
11 months ago - at 05/13/2025 05:52AM
We are still investigating. During the period, the error rate has remained low as initially reported, approximately ~0.015%.
INVESTIGATING
11 months ago - at 05/13/2025 05:22AM
We are investigating an unexpected but small increase in the percentage of API calls failing since 01:30UTC. Approximately 0.015% of API calls are failing with a HTTP 504 (Gateway timeout) error. We will update this incident as we have more information.
Latest SparkPost outages
Increased bounce or delay rate for Apple domains - 15 days ago
Email delivery in US region affected - about 1 month ago
Outbound message delivery is delayed/slow for some SparkPost customers (US and EU regions) - about 2 months ago
Microsoft Mail Delivery Delays and Temporary Rejections - about 2 months ago
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