Microsoft
MicrosoftAzureGuineaPig @ Thank you for reaching out. We would like to mention the recent changes to the bulk filter settings.
Per MC467231, we have changed our recommendation for Strict bulk threshold setting from “4” to “5”. This change is aimed at improving the efficiency of our bulk filter and reducing false positives (FPs). However, we understand that this change may cause some wanted emails to be junked, especially for tenants on strict BCL threshold levels i.e. <=5
We recommend fine-tuning your bulk filter settings by adjusting your bulk threshold slider to a higher value, to reduce FPs. Additionally, Microsoft Defender for Office 365 customers can use advanced hunting to identify bulk FPs and FNs to fine-tune bulk. It is important to note that different settings can be applied to different users based on the Anti-Spam policy applied to the users.
We understand that TABL is not a scalable solution for issues with high volume of senders. In such cases, you may need to change configurations. That said, we are also currently working on increasing TABL limits, and it is on our roadmap 98185 for next month.
We appreciate this feedback and will use it to improve our service.
