Verified70% confidenceFactExact time
SPF 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.
4
Sources
70%
Confidence
Long-term
Relevance
7/18/2026
First Seen
Sources
Related Claims
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