DKIM Validator

$4.99

Python tool to generate and validate DKIM signatures and DNS records. Debug authentication failures before they tank your deliverability. Parse DKIM-Signature headers, verify DNS records, and get actionable diagnostics.

• DKIM-Signature header parsing and field validation
• DNS TXT record lookup for DKIM public keys
• Key format validation (RSA key size, encoding)
• Selector discovery and enumeration
• Canonicalization mode checking (simple vs relaxed)
• Header/body hash verification walkthrough
• Diagnostic report with step-by-step fix instructions
• DNS record generator for common providers

# Validate DKIM for a domain
python dkim_validator.py check --domain example.com --selector default

# Parse a DKIM-Signature header
python dkim_validator.py parse --header-file dkim_header.txt

# Generate a DKIM DNS record
python dkim_validator.py generate --domain example.com --selector mail