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Update how-policies-and-protections-are-combined.md
in the section Exchange mail flow rules (also known as transport rules): When Mail flow rule blocks, if the message is spam or hspm or phish still filter wins and not organization Tested and confirmed on several tenant Also see EOP filtering stack https://learn.microsoft.com/en-us/defender-office-365/protection-stack-microsoft-defender-for-office365#phase-3---content-filtering ETR set scl before our filtering content https://learn.microsoft.com/en-us/defender-office-365/protection-stack-microsoft-defender-for-office365#phase-3---content-filtering if ETR set scl to 5 or 6 it will be overriden by SCL of our Machine learning
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defender-office-365/how-policies-and-protections-are-combined.md

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|Malware|**Filter wins**: Email quarantined|**Filter wins**: Email quarantined|
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|High confidence phishing|**Filter wins**: Email quarantined except in complex routing|**Filter wins**: Email quarantined|
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|Phishing|**Organization wins**: Email delivered to mailbox|**Organization wins**: Phishing action in the applicable anti-spam policy|
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|High confidence spam|**Organization wins**: Email delivered to mailbox|**Organization wins**: Email delivered to user's Junk Email folder|
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|Spam|**Organization wins**: Email delivered to mailbox|**Organization wins**: Email delivered to user's Junk Email folder|
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|Bulk|**Organization wins**: Email delivered to mailbox|**Organization wins**: Email delivered to user's Junk Email folder|
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|Phishing|**Organization wins**: Email delivered to mailbox|**filter wins**: Phishing action in the applicable anti-spam policy|
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|High confidence spam|**Organization wins**: Email delivered to mailbox|**filter wins**: Email delivered to user's Junk Email folder|
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|Spam|**Organization wins**: Email delivered to mailbox|**Filter wins**: Email delivered to user's Junk Email folder|
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|Bulk|**Organization wins**: Email delivered to mailbox|**Filter wins**: Email delivered to user's Junk Email folder|
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|Not spam|**Organization wins**: Email delivered to mailbox|**Organization wins**: Email delivered to user's Junk Email folder|
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<sup>\*</sup> Organizations that use a non-Microsoft security service or device in front of Microsoft 365 should consider using [Authenticated Received Chain (ARC)](email-authentication-arc-configure.md) (contact the service for availability) and [Enhanced Filtering for Connectors (also known as skip listing)](/exchange/mail-flow-best-practices/use-connectors-to-configure-mail-flow/enhanced-filtering-for-connectors) instead of an SCL=-1 mail flow rule. These improved methods reduce email authentication issues and encourage [defense-in-depth](step-by-step-guides/defense-in-depth-guide.md) email security.

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