checkdmarc

A Python module and command line utility for validating SPF and DMARC DNS records

Features

• API and CLI
• Can test multiple domains at once
• CLI output in JSON or CSV format
• Parses and validates MX, SPF, and DMARC records
• Checks for DNSSEC deployment
• Lists name servers
• Checks for STARTTLS and TLS support on each mail server