VULNIX0 / CASE FILEMODULE 07 — DNS & EMAIL SECURITY (SPF/DMARC)
MODULE 07 OF 16
DNS & Email Security (SPF/DMARC)
Email spoofing is still one of the cheapest ways to impersonate a brand, and a misconfigured nameserver can hand over your entire internal topology to anyone who asks. Vulnix0 validates SPF, DKIM, and DMARC policy strength, and tests directly whether your nameserver answers an unauthenticated zone-transfer request.
Exhibit — DNS & Email Security (SPF/DMARC) output, Vulnix0 dashboard
What We Check
Module 07 — checklist
✓SPF record presence and syntax validation
✓DKIM selector discovery and validation
✓DMARC policy strength (none / quarantine / reject)
✓Unauthenticated DNS zone transfer (AXFR) testing
✓Nameserver and MX record configuration review
✓CAA record presence for certificate-issuance control
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