RM491471 - Outlook: Unverified Senders- warn users about spoofing and impersonation attempts

Microsoft 365 Roadmap

Status

Launched

Release

General Availability

Last Updated

Dec 17, 2025

Published Apr 29, 2025

Platforms

Android
iOS

Service

Outlook

Tag

Launched
General Availability
Worldwide (Standard Multi-Tenant)

Cloud

Worldwide (Standard Multi-Tenant)

Summary

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.

Description

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.

GA date: July CY2025