Microsoft Defender for Office 365
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Anti Spam Bulk Complaint Level Bcl About

In brief

As of July 2026, messages identified as bulk receive the Promotions tag and, when Bulk moves enabled is turned on, are moved from the Inbox to the Promotions folder only when they are promotional in nature, regardless of BCL value.

What Defender admins need to know

Review anti-spam policy expectations for bulk mail, especially how promotional and non-promotional messages are routed.

Summaries are generated from the documentation change itself.

Documentation change

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But you can configure anti-spam policies to deliver bulk mail below the BCL threshold (even messages with the BCL value 0 identified as bulk) to a Promotions folder in supported versions of Outlook by using the Bulk moves enabled setting in anti-spam policies.

As of July 2026, all messages identified as bulk that are promotional in nature (regardless of BCL value) automatically receive the Promotions tag. When you turn on the Bulk moves enabled setting in anti-spam policies, bulk mailmail(which are promotional in nature) that would normally be delivered to the Inbox is delivered to the Promotions folder instead.

The system learns from user activity in the Promotions folder (moving messages in or out), and remembers the action for future messages.