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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 Jul 20, 2026 22:06 UTC · 7 checks · public report
Solid base — one policy step remains.
substack.com publishes an enforcing DMARC policy, so mail that forges its domain is quarantined or rejected at the recipient.
v=spf1 include:_spf.google.com include:mailgun.org include:mail.zendesk.com ~allEdit your SPF record at Cloudflare — step-by-step guide.
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