# Mailgun: Major incident: Errors connecting to smtp.eu.mailgun.org

**Summary:** Mailgun reported a major outage involving connection errors to smtp.eu.mailgun.org, starting 2025-03-17 09:20 UTC and resolved 2025-03-17 19:44 UTC, lasting 10 h 24 min. A mitigation restored SMTP and inbound email processing in the EU region to full working behavior at 15:02 UTC. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2025-03-17 09:20 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/zp2z9276bw6r](https://stspg.io/zp2z9276bw6r)
- [Company: Mailgun](https://rewindex.com/company/mailgun.md)
- Versions: before (none: first archived) → after incident\_version:251/b60dthm3t8gk@22ea9fa3cdd8
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Errors connecting to smtp.eu.mailgun.org
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-03-17 09:20 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-03-17 19:44 UTC
```

**6. Added: Affected components**

```diff
+ API, Email Services - API, Email Services - Inbound email processing, Email Services - Outbound Delivery, Email Services - SMTP, Inbound email processing, Outbound Delivery, SMTP
```

**7. Added: Update** (investigating) · 2025-03-17 09:20 UTC

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

**8. Added: Update** (investigating) · 2025-03-17 09:48 UTC

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

**9. Added: Update** (investigating) · 2025-03-17 10:29 UTC

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

**10. Added: Update** (identified) · 2025-03-17 11:56 UTC

```diff
+ The issue has been identified and a fix is being implemented.
```

**11. Added: Update** (identified) · 2025-03-17 14:22 UTC

```diff
+ We are continuing to work on a fix for this issue.
```

**12. Added: Update** (monitoring) · 2025-03-17 15:02 UTC

```diff
+ A mitigation has been put in place and SMTP / Inbound email processing in our EU region is back to full working behavior.
```

**13. Added: Update** (monitoring) · 2025-03-17 18:43 UTC

```diff
+ We are continuing to monitor for any further issues.
```

**14. Added: Update** (resolved) · 2025-03-17 19:44 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-03-17 09:20 UTC | Major incident: Errors connecting to smtp.eu.mailgun.org (this change) | outage |

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/i4ce9158ecc1943 · Markdown: https://rewindex.com/change/i4ce9158ecc1943.md · JSON: https://rewindex.com/api/v1/changes/i4ce9158ecc1943 · Generated 2026-10-18T02:55:13.136Z