Unverified50% confidenceFactExact time
DMARC记录中p=reject表示对验证失败邮件直接拒收，rua指定接收聚合报告的邮箱，还支持pct和sp参数
1
Sources
50%
Confidence
Long-term
Relevance
8/11/2026
First Seen
Sources
Related Claims
UnverifiedDMARC reports are divided into aggregate reports (received via rua, in XML format, sent daily) and forensic reports (received via ruf); due to privacy concerns, many recipients no longer send forensic reports.69% similarUnverifiedSPF declares authorized IPs via DNS TXT records, DKIM adds a digital signature to email headers via asymmetric encryption to verify that content has not been tampered with, and DMARC defines handling policies for authentication failures and provides aggregate reports.68% similarUnverifiedDMARC is an email authentication protocol built on top of SPF and DKIM that allows domain owners to tell receiving parties how to handle emails that fail authentication.66% similarUnverifiedIn the standard SMTP process, when an email is sent to a non-existent address, the receiving server returns a 5xx error code (such as 550 User Unknown) and the sender receives an NDR bounce notification.61% similar
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