Merge pull request #5134 from MicrosoftDocs/repo_sync_working_branch

Confirm merge from repo_sync_working_branch to main to sync with https://github.com/MicrosoftDocs/defender-docs (branch public)

Author: Ruchika-mittal01

defender-office-365/reports-email-security.md

@@ -560,6 +560,7 @@ In the **View data by Email \> Spam** and **Chart breakdown by Detection Technol
 - **Fingerprint matching**: The message closely resembles a previous detected malicious message.
 - **General filter**
 - **IP reputation**: The message was from a source that was previously identified as sending spam in other Microsoft 365 organizations.
+- **Mail bombing**: Messages detected as part of a mail bombing attack where attackers flood targeted email addresses with an overwhelming volume of messages.
 - **Mixed analysis detection**: Multiple filters contributed to the verdict for the message.
 - **URL malicious reputation**: The message contains a URL that was previously identified as malicious in other Microsoft 365 organizations.