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We are continuously refining our defense-in-depth approach, ensuring optimal protection when intermediaries are involved in your email traffic. We’re enhancing the assignment of Bulk Complaint Level (BCL) scores when connectors are utilized, particularly for instances where Composite Authentication (CAUTH) is set to None.
We are rolling out a significant update that will result in more accurate BCL scoring for bulk emails. This adjustment ensures that the presence of intermediaries is factored into the scoring, making bulk email filtering more consistent and reflective of the actual sender’s reputation. As a result, organizations can expect enhanced email filtering precision, leading to more reliable and effective management of bulk emails.
[When this will happen:]
General Availability (Worldwide, GCC, GCC High): We will begin rolling out early October 2024 and expect to complete by late October 2024.
[How this will affect your organization:]
- Admins using connectors may observe changes in bulk email filtering as the new BCL scoring system provides more accurate reflections of bulk email traffic. This update will automatically be available by default, and admins should expect to see these changes reflected in their filtering logs and reports.
- After the rollout, admins can expect to see an increase in the volume of bulk emails reflected in their Threat Protection Status (TPS) report. Specifically, when viewing data under Email > Spam and breaking down the chart by Detection Technology > Bulk, the updated scoring will provide a clearer insight into bulk email traffic handled by the system.
[What you need to do to prepare:]
Review your email filtering logs to assess the impact of the updated BCL scoring. Admins should also evaluate any custom rules or configurations in place and make necessary adjustments to optimize filtering based on the new scoring system.
For more details on BCL scoring and how it impacts your email security, see Bulk complaint level (BCL) in EOP.
Source: Microsoft
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The upcoming update to bulk email filtering in Exchange Online is set to make a splash! Admins and users alike can expect some positive changes that will enhance the email filtering experience.
Admins using connectors may notice a shift in how bulk emails are filtered due to the more accurate Bulk Complaint Level (BCL) scoring system. This means a more precise reflection of bulk email traffic, leading to improved management and security.
After the update, admins might see a surge in bulk emails in their Threat Protection Status report. This will provide a clearer picture of bulk email traffic, helping admins stay on top of their email security game.
To prepare for the update, admins should review their email filtering logs and tweak any custom rules to align with the new scoring system. It’s all about optimizing the filtering process for better email security.
In terms of criticality, this update is quite significant as it aims to enhance the accuracy of bulk email filtering, ultimately improving email security for organizations. So, get ready to embrace these changes and enjoy a more streamlined email filtering experience!