When you receive messages from senders we weren't able to verify as safe, you'll see a tag in the message list and a ribbon on the reading pane warning you to be cautious when interacting with it.
Roadmap › 491471
Outlook: Unverified Senders- warn users about spoofing and impersonation attempts
- General availability
- 2025-07
- Preview
- —
- Added
- 29 Apr 2025
- Last modified
- 17 Dec 2025 00:15 UTC
- First archived
- 25 Aug 2026
- Release rings
- General Availability
- Clouds
- Worldwide (Standard Multi-Tenant)