Merge pull request #2331 from MithunRathinam/patch-10

Update tenant-allow-block-list-about.md

Author: chrisda

defender-office-365/tenant-allow-block-list-about.md

@@ -59,7 +59,7 @@ Use the **Submissions** page (also known as *admin submission*) at <https://secu
   - Users in the organization can't send email to these blocked domains and addresses. They receive the following non-delivery report (also known as an NDR or bounce message): `550 5.7.703 Your message can't be delivered because messages to XXX, YYY are blocked by your organization using Tenant Allow Block List.` The entire message is blocked for all internal and external recipients of the message, even if only one recipient email address or domain is defined in a block entry.
 
   > [!TIP]
-  > To block only spam from a specific sender, add the email address or domain to the block list in [anti-spam policies](anti-spam-policies-configure.md). To block all email from the sender, use **Domains and email addresses** in the Tenant Allow/Block List.
+  > Blocking a specific sender or domain in the Tenant Allow/Block List treats those messages as high confidence phishing. To treat those messages as spam, add the sender to the blocked senders list or blocked domains list in [anti-spam policies](anti-spam-policies-configure.md). 
 
 - **[Files](submissions-admin.md#report-questionable-email-attachments-to-microsoft)**: Email messages that contain these blocked files are blocked as *malware*. Messages containing the blocked files are quarantined.