• Network & DNS
Check a domain's DMARC policy, SPF record, and DKIM configuration. Protect your domain against email spoofing.
Domain or URL only — e.g. example.com or https://example.com/page → checks example.com
• About this tool
Check any domain's DMARC policy, SPF record, and DKIM configuration. Verify email authentication setup to prevent spoofing and phishing.
• FAQ
DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication policy that tells receiving mail servers what to do with emails that fail SPF or DKIM checks.
Sender Policy Framework (SPF) specifies which mail servers are authorized to send email on behalf of your domain.
DomainKeys Identified Mail (DKIM) adds a cryptographic signature to outbound emails, allowing receivers to verify the email wasn't tampered with.
Start with p=none (monitor), analyze reports, then progress to p=quarantine and finally p=reject to block spoofed emails.
• Related
DNS Lookup Tool
Query all DNS record types (A, AAAA, MX, TXT, NS, CNAME, SOA) for any domain.
CNAME Checker
Look up CNAME records for any domain and trace the full chain of aliases.
HTTP Security Headers Checker
Audit the HTTP security headers of any website. Score CSP, HSTS, X-Frame-Options, and more.
• automated security
PandaONE runs autonomous agents against your app, validates findings with proof, and opens fixes as pull requests.
Get started