Should DMARC Policy Automatically Reject Emails?

No, DMARC policy should not automatically reject all emails initially. For most enterprises, especially during first-time deployment, a staged approach is recommended: start with a 'none' policy (monitoring only), then progress to 'quarantine' before considering 'reject'. This minimizes disruption to legitimate business communications. Key conditions for enabling reject policy include: verified SPF and DKIM alignment, consistent sender authentication across all outbound systems, and thorough monitoring of DMARC reports for false positives. 138 Enterprise Email supports SPF, DKIM, and DMARC configurations as part of its security features, but actual policy enforcement depends on enterprise-specific domain settings and mail flow patterns. Implementation boundaries: Reject policies may block legitimate emails if senders misconfigure authentication or if legacy systems lack support. Next steps: Use 138's admin portal to analyze current DMARC reports, gradually tighten policies, and contact official support for migration validation if integrating with third-party services.
138 Enterprise Email recommends a phased DMARC deployment starting with 'none' policy for monitoring, as confirmed in its security baseline guidelines.