# Greenhouse: Major incident: Microsoft 365 Delivery Issues

**Summary:** Greenhouse reported a major incident in which emails might not be sent for customers using custom SMTP routes with Microsoft 365. It started at 2026-06-19 17:24 UTC and resolved at 2026-06-19 22:24 UTC, lasting 4 h 59 min. A fix was implemented by 06-19 21:49 UTC. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-06-19 17:24 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/gh2m9780hrnc](https://stspg.io/gh2m9780hrnc)
- [Company: Greenhouse](https://rewindex.com/company/greenhouse.md)
- Versions: before (none: first archived) → after incident\_version:227/jdsd1tcdcrbl@4d6fa651c92f
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Microsoft 365 Delivery Issues
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-06-19 17:24 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-06-19 22:24 UTC
```

**6. Added: Affected components**

```diff
+ Greenhouse Recruiting - Silo 1, Greenhouse Recruiting - Silo 101, Greenhouse Recruiting - Silo 2, Greenhouse Recruiting - Silo 201, Greenhouse Recruiting - Silo 3, Greenhouse Recruiting - Silo 4, Greenhouse Recruiting - Silo 5, Greenhouse Recruiting - Silo 6, Greenhouse Recruiting - Silo 7, Greenhouse Recruiting - Silo 8, Greenhouse Recruiting - Silo 9, Silo 1, Silo 101, Silo 2, Silo 201, Silo 3, Silo 4, Silo 5, Silo 6, Silo 7, Silo 8, Silo 9
```

**7. Added: Update** (investigating) · 2026-06-19 17:24 UTC

```diff
+ We are currently investigating an issue where emails may not be sent for customers using custom SMTP routes with Microsoft 365.
```

**8. Added: Update** (identified) · 2026-06-19 18:39 UTC

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

**9. Added: Update** (monitoring) · 2026-06-19 21:49 UTC

```diff
+ A fix has been implemented and we are monitoring the results.
```

**10. Added: Update** (monitoring) · 2026-06-19 22:23 UTC

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

**11. Added: Update** (resolved) · 2026-06-19 22:24 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-06-19 17:24 UTC | Major incident: Microsoft 365 Delivery Issues (this change) | outage |

All Greenhouse changes: [timeline](https://rewindex.com/company/greenhouse/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/i7577177ee2b39d · Markdown: https://rewindex.com/change/i7577177ee2b39d.md · JSON: https://rewindex.com/api/v1/changes/i7577177ee2b39d · Generated 2026-10-18T01:30:17.251Z