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2 changes: 1 addition & 1 deletion exchange/exchange-ps/exchange/Set-AntiPhishPolicy.md
Original file line number Diff line number Diff line change
Expand Up @@ -351,7 +351,7 @@ This setting is part of spoof protection.

The EnableUnauthenticatedSender parameter enables or disables unauthenticated sender identification in Outlook. Valid values are:

- $true: This is the default value. A question mark (?) is applied to the sender's photo if the message does not pass SPF or DKIM checks AND the message does not pass DMARC or composite authentication. The via tag ([email protected] <u>via</u> michelle@fabrikam.com) is added if the domain in the From address (the message sender that's displayed in email clients) is different from the domain in the DKIM signature or the MAIL FROM address.
- $true: This is the default value. A question mark (?) is applied to the sender's photo if the message does not pass SPF or DKIM checks AND the message does not pass DMARC or composite authentication. The via tag ([email protected] <u>via</u> fabrikam.com) is added if the domain in the From address (the message sender that's displayed in email clients) is different from the domain in the DKIM signature or the MAIL FROM address.
- $false: A question mark is never applied to the sender's photo. The via tag is still added if the domain in the From address is different from the domain in the DKIM signature or the MAIL FROM address.

To prevent these identifiers from being added to messages from specific senders, you have the following options:
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