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merged 3 commits into from
Sep 26, 2025
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Update reports-email-security.md #361

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059c484
Update reports-email-security.md
EHLOBen Sep 26, 2025
8bda04a
Update reports-email-security.md
chrisda Sep 26, 2025
5a735a4
Fix duplicate 'Mail bombing' entry in email security report
chrisda Sep 26, 2025
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Expand Up @@ -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.

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