DNS & Email Authentication Suite

DNS & SPF Toolbox

Inspect and validate SPF lookup limits, DMARC policies, DKIM selectors, and global DNS records.

Examples: google.com cloudflare.com github.com justinmarty.com
API & Automation Guide

Query DNS diagnostics programmatically via JSON REST API:

# SPF and DMARC health check
curl "https://justinmarty.com/dnstool/api/lookup?domain=example.com&type=SPF"

# Full DNS 360-degree audit
curl "https://justinmarty.com/dnstool/api/lookup?domain=example.com&type=ALL"