SparkPost experienced a major incident on March 12, 2026 affecting SMTP Delivery - USA, lasting 4h 33m. The incident has been resolved; the full update timeline is below.
Affected components
SMTP Delivery - USA
Update timeline
- investigating Mar 12, 2026, 06:51 AM UTC
We are currently investigating issues with delivery of email impacting US region.
- monitoring Mar 12, 2026, 07:48 AM UTC
System is fully recovered and under monitoring.
- investigating Mar 12, 2026, 08:00 AM UTC
Email delivery in US is impacted, experiencing elevated delays.
- monitoring Mar 12, 2026, 10:03 AM UTC
System functionality has been fully restored and all emails are being transmitted correctly without added latencies; we are actively monitoring.
- resolved Mar 12, 2026, 11:25 AM UTC
This incident has been resolved.