# Mailgun: Critical incident: Intermittent API Errors

**Summary:** Mailgun reported critical intermittent API errors affecting API, Control Panel, Email Validation and SMTP, starting 2025-05-14 18:38 UTC and resolving 2025-05-14 22:18 UTC after 3 h 40 min. Mailgun identified a routing issue in its internal service mesh and deployed a fix. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2025-05-14 18:38 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/xb5rb7hwdrgx](https://stspg.io/xb5rb7hwdrgx)
- [Company: Mailgun](https://rewindex.com/company/mailgun.md)
- Versions: before (none: first archived) → after incident\_version:251/qj5y3klf3fr6@6f947328ec75
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Intermittent API Errors
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-05-14 18:38 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-05-14 22:18 UTC
```

**6. Added: Affected components**

```diff
+ API, Control Panel, Customer Tools - Control Panel, Deliverability Services - Email Validation, Email Services - API, Email Services - SMTP, Email Validation, SMTP
```

**7. Added: Update** (investigating) · 2025-05-14 18:38 UTC

```diff
+ We are currently investigating this issue.
```

**8. Added: Update** (investigating) · 2025-05-14 18:48 UTC

```diff
+ We are continuing to investigate this issue.
```

**9. Added: Update** (investigating) · 2025-05-14 19:12 UTC

```diff
+ We are continuing to investigate this issue.
```

**10. Added: Update** (investigating) · 2025-05-14 20:41 UTC

```diff
+ We are continuing to investigate this issue.
```

**11. Added: Update** (investigating) · 2025-05-14 21:08 UTC

```diff
+ We are continuing to investigate this issue.
```

**12. Added: Update** (identified) · 2025-05-14 21:32 UTC

```diff
+ We identified a routing issue in our internal service mesh. We are attempting to roll out a fix.
```

**13. Added: Update** (monitoring) · 2025-05-14 22:03 UTC

```diff
+ A fix has been deployed and we are monitoring.
```

**14. Added: Update** (resolved) · 2025-05-14 22:18 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-05-14 18:38 UTC | Critical incident: Intermittent API Errors (this change) | degradation |

All Mailgun changes: [timeline](https://rewindex.com/company/mailgun/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._


---
Canonical: https://rewindex.com/change/i9c3a65834d1291 · Markdown: https://rewindex.com/change/i9c3a65834d1291.md · JSON: https://rewindex.com/api/v1/changes/i9c3a65834d1291 · Generated 2026-10-18T02:55:24.996Z