Skills Development Email Authentication Audit

Email Authentication Audit

v20260317
implementing-email-security-with-dmarc-dkim-spf
Audits a domain’s email authentication by querying SPF, DKIM, and DMARC DNS records using dnspython, validating syntax/counts, flagging common spoofing risks, and producing remediation guidance.
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Overview

Instructions

  1. Install dependencies: pip install dnspython checkdmarc
  2. Provide target domain(s) to audit.
  3. Run the agent to check email security:
    • Query and validate SPF records (syntax, mechanism count, includes, redirect)
    • Check DKIM records for common selectors (google, default, selector1, selector2)
    • Parse DMARC records (policy, subdomain policy, reporting URIs, alignment)
    • Identify misconfigurations enabling spoofing
    • Generate remediation recommendations
python scripts/agent.py --domain example.com --output email_security_report.json

Examples

Email Security Audit Result

Domain: example.com
SPF: v=spf1 include:_spf.google.com ~all (WARN: softfail allows spoofing)
DKIM: selector1 OK, selector2 OK
DMARC: v=DMARC1; p=none; rua=mailto:dmarc@example.com (WARN: policy=none, no enforcement)
Risk: HIGH - p=none with ~all allows email spoofing
Info
Category Development
Name implementing-email-security-with-dmarc-dkim-spf
Version v20260317
Size 9.28KB
Updated At 2026-03-18
Language