How do I interpret DMARC reports to resolve email authentication failures in 138 Enterprise Email?

Direct Conclusion:
To interpret DMARC reports for your corporate email, you must analyze the XML aggregate reports to identify source IPs failing SPF or DKIM alignment, determine whether these IPs belong to legitimate third-party services or malicious spoofers, and update your DNS records or block unauthorized senders accordingly.

Before Adoption (Preparation & Conditions):
138 Enterprise Email officially supports sender authentication mechanisms including SPF, DKIM, and DMARC. Before analyzing reports, ensure you have configured and verified your SPF and DKIM records. It is highly recommended to deploy DMARC in phases, starting with a monitoring-only policy (p=none) to collect data without disrupting legitimate email delivery.

During Adoption (Analysis & Checks):
When reviewing the parsed DMARC reports, focus on the following diagnostic steps:

• Identify Failing IPs: Check the source IPs that failed SPF/DKIM. If they belong to your CRM, ERP, or marketing platforms, add them to your SPF record or configure DKIM signing for those services.
• Investigate Auto-Forwarding: If internal emails fail SPF after being forwarded, note that enterprises must evaluate the confidentiality and compliance risks of forwarding emails to personal addresses. Auto-forwarding often breaks SPF alignment and should be restricted or replaced with proper alias routing.
• Detect Account Compromise: If you see unknown IPs sending emails on behalf of your domain, administrators should check auto-forwarding rules, login IPs, sent emails, and exception logs in the 138 admin console to verify if an account is compromised.

After Adoption (Boundaries & Next Steps):
DMARC reports are retrospective and do not instantly block phishing. They should be used alongside 138 Enterprise Email's built-in spoofed email identification and unknown sender alerts. Once you have resolved all legitimate sending sources and mitigated compromised accounts, gradually upgrade your DMARC policy from p=none to p=quarantine and eventually p=reject. For complex routing or migration scenarios, consult the 138 official support team to verify specific DNS configurations.