# SparkPost: Major incident: Email delivery in US region affected

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2026-03-12 06:51 UTC · Detected: 2026-10-19 18:53 UTC
- [Source: https://stspg.io/756rm9zd2vm1](https://stspg.io/756rm9zd2vm1)
- [Company: SparkPost](https://rewindex.com/company/sparkpost.md)
- Versions: before (none: first archived) → after incident\_version:755/k7n5ptqxgwck@2324a5807f62
- Change 1 of 1 for this incident

Incident page (full timeline): [Email delivery in US region affected](https://rewindex.com/company/sparkpost/incidents/k7n5ptqxgwck.md)
## What changed

**1. Added: Title**

```diff
+ Email delivery in US region affected
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-03-12 06:51 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-03-12 11:25 UTC
```

**6. Added: Affected components**

```diff
+ SMTP Delivery (Outbound Message Delivery) - SMTP Delivery - USA, SMTP Delivery - USA
```

**7. Added: Update** (investigating) · 2026-03-12 06:51 UTC

```diff
+ We are currently investigating issues with delivery of email impacting US region.
```

**8. Added: Update** (monitoring) · 2026-03-12 07:48 UTC

```diff
+ System is fully recovered and under monitoring.
```

**9. Added: Update** (investigating) · 2026-03-12 08:00 UTC

```diff
+ Email delivery in US is impacted, experiencing elevated delays.
```

**10. Added: Update** (monitoring) · 2026-03-12 10:03 UTC

```diff
+ System functionality has been fully restored and all emails are being transmitted correctly without added latencies; we are actively monitoring.
```

**11. Added: Update** (resolved) · 2026-03-12 11:25 UTC

```diff
+ This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-03-12 06:51 UTC | Major incident: Email delivery in US region affected (this change) | major |

All SparkPost changes: [timeline](https://rewindex.com/company/sparkpost/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i03637e1e2839e9 · Markdown: https://rewindex.com/change/i03637e1e2839e9.md · JSON: https://rewindex.com/api/v1/changes/i03637e1e2839e9 · Generated 2026-10-19T21:44:31.199Z