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Checking SPF, DMARC, DKIM, MX, DNS, blacklists and domain & SSL expiry. A domain we haven't scanned before takes a few seconds — hang tight.
Scanned Oct 14, 2026 06:40 UTC · 7 checks · public report
Solid base — three policy steps remain.
katrinziebart.de publishes DMARC with p=none — spoofed mail is monitored but not blocked.
v=spf1 a mx ~all v=DMARC1; p=none; rua=mailto:dmarc@katrinziebart.de; adkim=r; aspf=rOne send: the full report — every finding and fix — lands in your inbox, with a free account waiting. Opening it signs you in and starts a 14-day Monitor trial. No card, and you can unsubscribe in one click.
Domain owner? Re-scan any time — or email hello@dnsdoctor.dev to have this page removed.
TLS certificate expires 2026-11-07