Update anti-phishing-policies-mdo-configure.md

To enhance readability and provide quick access to more details, consider making these terms such as SPF, DKIM and DMARC clickable, linking to definitions or explanations that outline their functions and importance in email authentication and security.

Author: MithunRathinam

defender-office-365/anti-phishing-policies-mdo-configure.md

@@ -321,7 +321,7 @@ For anti-phishing policy procedures in organizations without Defender for Office
      - **Show user impersonation safety tip**: This setting is available only if you selected **Enable users to protect** on the previous page.
      - **Show domain impersonation safety tip**: This setting is available only if you selected **Enable domains to protect** on the previous page.
      - **Show user impersonation unusual characters safety tip** This setting is available only if you selected **Enable users to protect** or **Enable domains to protect** on the previous page.
-     - **Show (?) for unauthenticated senders for spoof**: This setting is available only if you selected **Enable spoof intelligence** on the previous page. Adds a question mark (?) to the sender's photo in the From box in Outlook if the message doesn't pass SPF or DKIM checks **and** the message doesn't pass DMARC or [composite authentication](email-authentication-about.md#composite-authentication). This setting is selected by default.
+     - **Show (?) for unauthenticated senders for spoof**: This setting is available only if you selected **Enable spoof intelligence** on the previous page. Adds a question mark (?) to the sender's photo in the From box in Outlook if the message doesn't pass [Sender Policy Framework (SPF)](email-authentication-spf-configure.md) or [DomainKeys Identified Mail (DKIM)](email-authentication-dkim-configure.md) checks **and** the message doesn't pass [Domain-based Message Authentication, Reporting and Conformance (DMARC)](email-authentication-dmarc-configure.md) or [composite authentication](email-authentication-about.md#composite-authentication). This setting is selected by default.
      - **Show "via" tag**: This setting is available only if you selected **Enable spoof intelligence** on the previous page. Adds tag named via (`[email protected] via fabrikam.com`) to the From address if it's different from the domain in the DKIM signature or the **MAIL FROM** address. This setting is selected by default.
 
      To turn on a setting, select the check box. To turn it off, clear the check box.