<ul><li>After implementing email authentication, receiving DMARC reports become crucial for understanding email authentication status and potential security issues.</li><li>An analysis of a DMARC report highlighted multiple IP addresses sending emails, DKIM and SPF failures, and SPF results showing 'permerror'.</li><li>Investigation of the source IPs revealed unauthorized use of the domain from China Telecom network in Jiangsu Province, China.</li><li>To protect domains, it is recommended to configure SPF records, implement DMARC policies, and follow additional security measures such as DKIM configuration, deactivation of mail servers, regular monitoring, and domain registration maintenance.</li></ul>

Understanding and Preventing Email Spoofing Through DMARC Reports: A Technical Analysis

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