# SparkPost: Elevated 5xx Suppression List API error rates and latency for some SparkPost customers (US hosted only)

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-05-11 18:55 UTC · Resolved: 2026-05-11 20:02 UTC · Duration: 1.1 h
- Updates: 3 · Affected components: Suppression List API - Suppression List API - USA, Suppression List API - USA
- [Vendor status page: https://stspg.io/09ccmn7kj1sd](https://stspg.io/09ccmn7kj1sd)
- [Company: SparkPost](https://rewindex.com/company/sparkpost.md)

## Timeline of updates

- **identified** 2026-05-11 18:55 UTC: We are experiencing an elevated level of errors and latency on the Suppression List API for some SparkPost customers. Please retry any 5xx error. Note: This issue does not impact SparkPost customers hosted in the EU.
- **monitoring** 2026-05-11 19:46 UTC: A fix has been implemented and we are monitoring the results.
- **resolved** 2026-05-11 20:02 UTC: This incident has been resolved.


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Canonical: https://rewindex.com/company/sparkpost/incidents/cz6f92rfx50b · Markdown: https://rewindex.com/company/sparkpost/incidents/cz6f92rfx50b.md · JSON: https://rewindex.com/api/v1/companies/sparkpost/incidents/cz6f92rfx50b · Generated 2026-10-19T21:08:40.359Z