Spoof Intelligence from Microsoft 365 Advanced Threat Protection and Exchange Online Protection helps prevent phishing messages from reaching your Outlook inbox. Outlook verifies that the sender is who they say they are and marks malicious messages as junk email. If the message is suspicious but isn’t deemed malicious, the sender will be marked as unverified to notify the receiver that the sender may not be who they appear to be.
Important: When a message is marked as a phishing message, Outlook displays a warning at the top of the page, but any links in the message can still be opened.
If you’re an admin and want to manage this feature in your Microsoft 365 tenant, see Spoof settings in anti-phishing policies in Office 365.
Note: This feature is supported for Enterprise outlook.com users. It is not currently available for Consumer outlook.com.