Outbound Spam Filter Policy - Microsoft Community Hub
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How to restrict sending to max 20 x recipients outbound for user mailboxes and allow more for systems sending out. · Issue #2729 · MicrosoftDocs/microsoft-365-docs · GitHub
Configure Outbound Spam Policy and Protect Your Microsoft 365 Security
Outbound spam filter policy Archives - Office 365 for IT Pros
Configure Outbound Spam Policy and Protect Your Microsoft 365 Security