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

- Provider: [SparkPost](https://down.guide/sparkpost)
- Level: confirmed
- Impact: Degraded
- lasted 1h 35m
- started 2025-11-11 14:35 UTC
- SMTP Delivery - USA
- eu, us
- id: DWN-212907c425
- Official page: https://stspg.io/dkjsbydmg3mz

## Updates from SparkPost
### 2025-11-11 14:35 UTC: investigating
We are investigating an increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the EU.)

### 2025-11-11 15:01 UTC: identified
The issue has been identified and a fix is being implemented.

### 2025-11-11 16:10 UTC: resolved
This incident impacted a limited batch of messages injected via SMTP API. 
We have quarantined the impacted the node and working on delivering the messages and isolating the root cause.
The SMTP API is full operational

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