Super Tool
Advanced DNS lookup and email authentication checker
This page provides original, human-reviewed information about the combined super tool workflow, explaining how chaining DNS, authentication, and reputation checks speeds up root-cause diagnosis.
Key Features
- • Real-time DNS record lookup
- • Email authentication analysis (SPF, DKIM, DMARC)
- • Reverse DNS (PTR) lookup support
- • Comprehensive record type support
- • Professional troubleshooting tools
Use Cases
- • Email deliverability troubleshooting
- • Domain configuration verification
- • Security policy analysis
- • Network infrastructure auditing
- • DNS propagation checking
MX (Mail Exchange) Records
Specify the mail servers responsible for accepting email messages for a domain.
Use case: Email routing, setting up email services, configuring mail servers.
A (Address) Records
Map domain names to IPv4 addresses (32-bit).
Use case: Website hosting, connecting domains to servers, basic DNS resolution.
AAAA (IPv6 Address) Records
Map domain names to IPv6 addresses (128-bit).
Use case: IPv6 connectivity, modern network infrastructure, future-proofing.
CNAME (Canonical Name) Records
Create aliases that point one domain name to another domain name.
Use case: Subdomain redirection, CDN setup, service aliasing (www.example.com → example.com).
TXT (Text) Records
Store arbitrary text data associated with a domain.
Use case: Domain verification, SPF/DKIM/DMARC records, site ownership proof.
SPF (Sender Policy Framework) Records
Define which mail servers are authorized to send email on behalf of your domain.
Use case: Email security, preventing email spoofing, improving deliverability.
DKIM (DomainKeys Identified Mail) Records
Provide cryptographic authentication for email messages using digital signatures.
Use case: Email authentication, preventing email tampering, building sender reputation.
DMARC (Domain-based Message Authentication) Records
Specify how to handle emails that fail SPF or DKIM authentication.
Use case: Email policy enforcement, phishing protection, email security reporting.
PTR (Pointer) Records
Provide reverse DNS lookup, mapping IP addresses back to domain names.
Use case: Email server reputation, network troubleshooting, security verification.
SOA (Start of Authority) Records
Define administrative information about the DNS zone.
Use case: DNS zone management, defining authoritative nameservers, zone transfer settings.
SRV (Service) Records
Define the location of specific services within a domain.
Use case: Service discovery, VoIP configuration, instant messaging, game servers.
SPF (Sender Policy Framework)
SPF records specify which mail servers are authorized to send email on behalf of your domain.
v=spf1 include:_spf.google.com ~allDKIM (DomainKeys Identified Mail)
DKIM uses cryptographic signatures to verify that emails haven't been tampered with.
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA...DMARC (Domain-based Message Authentication)
DMARC policies specify how to handle emails that fail SPF or DKIM authentication.
v=DMARC1; p=quarantine; rua=mailto:dmarc@example.comNo Records Found
- • Check if the domain name is spelled correctly
- • Verify that the record type exists for this domain
- • For DKIM records, confirm the correct selector with the domain administrator
- • DNS changes can take up to 48 hours to propagate
Email Delivery Issues
- • Ensure SPF records include all authorized mail servers
- • Verify DKIM signatures are properly configured
- • Check DMARC policy alignment (SPF and DKIM must pass)
- • Monitor DMARC reports for authentication failures
DNS Propagation
- • New DNS records may take time to propagate globally
- • Use multiple DNS checkers to verify propagation status
- • Lower TTL values before making changes for faster updates
- • Clear local DNS cache if seeing outdated results
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