# SparkPost: Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2025-05-18 14:58 UTC · Resolved: 2025-05-18 19:03 UTC · Duration: 4.1 h
- Updates: 3 · Affected components: SMTP Delivery (Outbound Message Delivery) - SMTP Delivery - USA, SMTP Delivery - USA
- [Vendor status page: https://stspg.io/3v4hs2vrvj8v](https://stspg.io/3v4hs2vrvj8v)
- [Company: SparkPost](https://rewindex.com/company/sparkpost.md)

## Timeline of updates

- **investigating** 2025-05-18 14:58 UTC: We are investigating an increase in delivery latency for a small percentage of outbound messages.  (NOTE: This does not impact our customers hosted in the EU.)
- **monitoring** 2025-05-18 15:11 UTC: Latencies are now back to normal.  We will continue monitoring, but do not expect any further deviation.
- **resolved** 2025-05-18 19:03 UTC: Latencies have remained normal since the last update.  We are confident the situation is fully resolved.


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Canonical: https://rewindex.com/company/sparkpost/incidents/l24bdlh7dfqz · Markdown: https://rewindex.com/company/sparkpost/incidents/l24bdlh7dfqz.md · JSON: https://rewindex.com/api/v1/companies/sparkpost/incidents/l24bdlh7dfqz · Generated 2026-10-19T21:09:09.903Z