491471 – Outlook: Unverified Senders- warn users about spoofing and impersonation attempts

Product:

Outlook

Platform:

Android, iOS, World tenant

Status:

Launched

Change type:

Links:

MC1112452

Details:

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.

Change Category:
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Scope:
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Release Phase:
General Availability

Created:
2025-05-02

updated:
2025-12-18

Docu to Check

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MS workload name

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summary for non-techies**

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Direct effects for Operations**

Please, look at the most relevant linked item for details

explanation for non-techies**

In the world of email communication, ensuring the safety and authenticity of messages is crucial. Outlook has introduced a feature that helps users identify potentially unsafe emails by tagging messages from unverified senders. This is akin to receiving a package at your doorstep without a return address. Just as you would be cautious about opening such a package, Outlook encourages you to be careful with emails that can't be verified as safe.

When you receive an email from a sender that Outlook cannot confirm as trustworthy, a warning tag will appear in your message list, and a ribbon will be displayed in the reading pane. This visual cue is like a "handle with care" label, alerting you to proceed with caution. The purpose is to protect you from spoofing and impersonation attempts, where malicious actors pretend to be someone they're not to gain your trust or access sensitive information.

This feature is available across various platforms, including Android, ensuring that users can benefit from this added layer of security regardless of the device they use. By being aware of these warnings, you can make more informed decisions about which emails to engage with, much like choosing to open a letter only if you're confident about its source.