Domain Auth Analyzer — SPF / DKIM / DMARC

Upload a TXT/CSV (one domain per line/cell). We query DNS-over-HTTPS for SPF, DKIM (selectors you provide), DMARC, and BIMI (TXT with v=BIMI1). We compute adoption, enforcement, and a “likely-effective DMARC” heuristic. Reports save in your browser; you can reopen or export PDF/CSV/JSON.

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Info: Guidance: EU — Internet Standards for Email. DMARC community stats: dmarc.org/stats. For global popularity lists, see Tranco.

Created by ChatGPT. This is a helper for verifying public DNS (SPF/DKIM/DMARC). It is not a deliverability guarantee.