Detect External Mail Forwarding for Financial Services & Banking
How financial services & banking organizations should implement EXT-07 for Microsoft 365 security and compliance.
Financial Services & Banking organizations face unique security challenges when managing Microsoft 365 environments. The EXT-07 control (Detect External Mail Forwarding) is particularly important for this sector due to soc2 and pci-dss requirements.
Why Financial Services & Banking Organizations Need This Control
Financial Services & Banking organizations face specific regulatory requirements including soc2, pci-dss, nist-800-53, iso27001. The EXT-07 control helps address these requirements by:
- Mailbox forwarding rules to external addresses are identified
- Inbox rules forwarding to external domains are flagged
- No unexpected external forwarding rules exist
Attackers commonly set up mail forwarding rules after compromising accounts. These rules silently copy all emails to external addresses, enabling ongoing data theft even after the initial compromise is remediated.
Industry-Specific Considerations
When implementing EXT-07 in a financial services & banking environment, consider:
- **Regulatory requirements**: soc2, pci-dss, nist-800-53 may mandate specific configurations
- **Risk tolerance**: Financial Services & Banking organizations typically have moderate to low risk tolerance
- **Audit frequency**: Plan for regular compliance reviews
- **Documentation**: Maintain detailed records for regulatory inspections
Implementation Steps
To implement EXT-07 in your Microsoft 365 environment:
- Mailbox forwarding rules to external addresses are identified
- Inbox rules forwarding to external domains are flagged
- No unexpected external forwarding rules exist
This control requires manual implementation through the Entra admin center.
Financial Services Compliance Requirements
Financial Services organizations must comply with these frameworks, all of which address detect external mail forwarding:
Why This Control Matters for Financial Services
Attackers commonly set up mail forwarding rules after compromising accounts. These rules silently copy all emails to external addresses, enabling ongoing data theft even after the initial compromise is remediated.
Common threats in financial services & banking:
- • Account takeover attacks
- • Insider trading through unauthorized access
- • Wire fraud via business email compromise
For financial services & banking organizations, EXT-07 is a key component of a compliant Microsoft 365 security posture. TrueConfig helps you implement and maintain this control while meeting industry-specific requirements.
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