Mail headers and the DNS records that authenticate your mail.
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Email Header Analyzer
Paste raw email headers to see the Received hop chain with per-hop delays, and the SPF/DKIM/DMARC verdicts as reported by the verifying server.
↗SPF, DKIM & DMARC Generator
Compose SPF, DKIM and DMARC TXT records with per-option explanations, RFC 7208 lookup counting, DKIM key formatting and DMARC best-practice warnings — offline.