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

> SparkPost status incident “Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)” on 2026-10-28: impact minor (vendor’s label), 50 min, 6 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/sparkpost/incidents/dgp65ql0ksld
Last updated: 2026-10-28T21:04:44Z

- Impact (vendor’s label): minor
- Status: resolved · edited after publishing
- Started: 2026-10-28 19:48 UTC · Resolved: 2026-10-28 20:37 UTC · Duration: 50 min
- Updates: 6 · Affected components: SMTP Delivery - Outbound Message Delivery,  - SMTP Delivery - USA
- [Vendor status page: https://status.sparkpost.com/incidents/dgp65ql0ksld](https://status.sparkpost.com/incidents/dgp65ql0ksld)
- [Company: SparkPost](https://rewindex.com/company/sparkpost.md)

## Timeline of updates

- **investigating** 2026-10-28 19:37 UTC: We are investigating an increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the EU.)
- **identified** 2026-10-28 19:48 UTC: The issue has been identified and a fix is being implemented.
- **monitoring** 2026-10-28 20:00 UTC: A fix has been implemented and we are monitoring the results.
- **identified** 2026-10-28 20:03 UTC: We are continuing to work on a fix for this issue.
- **monitoring** 2026-10-28 20:37 UTC: A fix was implemented and we are seeing sustained delivery recovery.
- **resolved** 2026-10-28 20:37 UTC: This incident has been resolved.

## Rewindex changes for this incident

- 2026-10-28 20:03 UTC: [Incident updated: Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)](https://rewindex.com/change/r668fe2eddf2496.md)
- 2026-10-28 21:04 UTC: [Incident updated: Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)](https://rewindex.com/change/rb5835ab3fb9cf3.md)

## Cite this

Status incident (vendor impact label: minor) posted by SparkPost, started 2026-10-28 19:48 UTC, resolved after 50 min, 6 update(s); edited after publishing.

- Canonical URL: https://rewindex.com/company/sparkpost/incidents/dgp65ql0ksld
- Citation: SparkPost, “Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)” (2026-10-28 19:48 UTC). Archived by Rewindex: https://rewindex.com/company/sparkpost/incidents/dgp65ql0ksld (CC BY 4.0).
- Markdown link: `[SparkPost: Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only) (2026-10-28)](https://rewindex.com/company/sparkpost/incidents/dgp65ql0ksld)`


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Canonical: https://rewindex.com/company/sparkpost/incidents/dgp65ql0ksld · Markdown: https://rewindex.com/company/sparkpost/incidents/dgp65ql0ksld.md · JSON: https://rewindex.com/api/v1/companies/sparkpost/incidents/dgp65ql0ksld · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T16:04:45.084Z