ORCA.101: Bulk is marked as spam.
| ID | ORCA.101 |
| Severity | Low |
| Suite | ORCA |
| Product | Defender |
| Related products | Exchange Online |
| Feature | Anti-spam |
| Security area | Email and collaboration protection |
| Resource type | Policy |
| User impact of fixing | Low |
| Effort to fix | Low |
| Framework controls | nist-800-53-r5:SI-8 Spam Protection |
| Reads from | Exchange Online |
What this checks and how to fix it
Section titled “What this checks and how to fix it”The differentiation between bulk and spam can sometimes be subjective. The bulk complaint level is based on the number of complaints from the sender. Marking bulk as spam can decrease the amount of perceived spam received. This setting is only available in PowerShell.
Remediation action
Section titled “Remediation action”Set the anti-spam policy to mark bulk mail as spam.
Related Links
Section titled “Related Links”- Recommended settings for EOP and Microsoft Defender for Office 365 security
- Set-HostedContentFilterPolicy
Mito check, based on ORCA. Author: soulemike. Open-source licences.
Open-source licences. CIS Benchmark material © Center for Internet Security, Inc.; CISA SCuBA baselines are public domain (CC0).
© 2026 Virtual Petals. Mito is a Virtual Petals service, hosted in Microsoft Azure UAE North.
