SparkPost experienced a minor incident on October 1, 2026 affecting SMTP Delivery - USA and SMTP Delivery - EUROPE, lasting 31m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Oct 01, 2026, 05:05 PM UTC
Some email deliveries are being delayed. The delays come and go, and queued messages are being delivered once each one clears. Our team is investigating the cause and working on a fix. We'll post an update here as soon as we know more. We apologize for the disruption.
- monitoring Oct 01, 2026, 05:16 PM UTC
We've made changes to address the intermittent delivery delays. Since then, email has been delivered without delay, including during peak sending periods that previously caused the slowdowns. We're watching closely to confirm the issue is fully resolved and will post an update here. Thank you for your patience.
- resolved Oct 01, 2026, 05:36 PM UTC
This issue has been resolved. Since our changes went in, we've seen no further delivery delays, including through peak sending periods. Email is being delivered normally. We apologize for the disruption and thank you for your patience.