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

- Provider: [SparkPost](https://down.guide/sparkpost)
- Level: confirmed
- Impact: Degraded
- lasted 1h 1m
- started 2025-11-27 14:22 UTC
- SMTP Delivery - USA
- eu, us
- id: DWN-e15bf00734
- Official page: https://stspg.io/1jwgd1k0wphv

## Updates from SparkPost
### 2025-11-27 14:22 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.)

### 2025-11-27 14:22 UTC: identified
The issue has been identified and a fix is being implemented.

### 2025-11-27 14:23 UTC: monitoring
A fix has been implemented and we are monitoring the results.

### 2025-11-27 14:44 UTC: monitoring
The MTA1 cluster is beginning to stabilize and we are seeing active recovery. We will continue to monitor and provide updates as the cluster fully recovers.

### 2025-11-27 14:50 UTC: monitoring
We continue to see significant recovery on the delayed messages. Continuing to monitor and will post the next status after full recovery.

### 2025-11-27 15:24 UTC: resolved
We have seen fully recovery from this delay event. A postmortem will be posted shortly detailing the root cause and steps we have taken to prevent a reoccurrence.

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