DNS Lookup & SPF/DMARC/DKIM Inspector

Perform live DNS-over-HTTPS (DoH) queries, inspect A, MX, TXT, and CAA records, or construct valid SPF, DMARC, and DKIM email security policies 100% in browser.

Live DNS-over-HTTPS Query

Samples:

SPF (Sender Policy Framework) Builder

Domain Name All Policy Qualifier Include Services Allowed IPv4 Addresses

Quick Presets for Popular Mail Providers

+ Google Workspace + Microsoft 365 + SendGrid + Mailgun + Yandex 360

Allow Domain MX (mx) Allow Domain A Record (a)

DMARC Policy Generator

Domain Name Policy Action (p) Subdomain Policy (sp) SPF Alignment (aspf) Aggregate Report Email (rua) Forensic Report Email (ruf) Percentage Filter (pct)

DKIM (DomainKeys Identified Mail) Record Constructor

DKIM Selector Domain Name Public Key String (p=)

DNS Records for {{ queryDomain }} — {{ records.length }} found

{{ rec.typeLabel }} {{ rec.name }} TTL {{ rec.TTL }}s

Generated SPF TXT Record

{{ spfRecord }}

Generated DMARC TXT Record (Host: _dmarc.{{ dmarcDomain || 'example.com' }})

{{ dmarcRecord }}

Generated DKIM TXT Record (Host: {{ dkimSelector || 'default' }}._domainkey.{{ dkimDomain || 'example.com' }})

{{ dkimRecord }}

About DNS Lookup & DoH

This tool uses DNS-over-HTTPS (DoH) through public secure resolvers (Cloudflare and Google DoH APIs) to query domain DNS records live directly from your browser without calling backend proxy servers.

DNS Lookup & SPF/DMARC/DKIM Inspector

Live DNS-over-HTTPS Query

SPF (Sender Policy Framework) Builder

Quick Presets for Popular Mail Providers

DMARC Policy Generator

DKIM (DomainKeys Identified Mail) Record Constructor

DNS Records for {{ queryDomain }} — {{ records.length }} found Download BIND File {{ copied ? '✓ Copied' : 'Copy BIND Zone' }}

Generated SPF TXT Record {{ copiedSpf ? '✓ Copied' : 'Copy TXT Record' }}

Generated DMARC TXT Record (Host: _dmarc.{{ dmarcDomain || 'example.com' }}) {{ copiedDmarc ? '✓ Copied' : 'Copy TXT Record' }}

Generated DKIM TXT Record (Host: {{ dkimSelector || 'default' }}._domainkey.{{ dkimDomain || 'example.com' }}) {{ copiedDkim ? '✓ Copied' : 'Copy TXT Record' }}

About DNS Lookup & DoH

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DNS Records for {{ queryDomain }} — {{ records.length }} found

Generated SPF TXT Record

Generated DMARC TXT Record (Host: _dmarc.{{ dmarcDomain || 'example.com' }})

Generated DKIM TXT Record (Host: {{ dkimSelector || 'default' }}._domainkey.{{ dkimDomain || 'example.com' }})