Core Platform
Diagnostic Suites Hub
Orchestrate multi-protocol diagnostics across email deliverability, zero-trust perimeter defense, active SMTP handshake verification, and web headers. While standalone tools evaluate individual DNS records, Suites run 4 to 13 underlying inspection engines in parallel, correlating cross-protocol findings into comprehensive health scores and prioritized remediation blueprints.
Key Capabilities & Features
dnsfyi combines high-speed global Anycast DNS queries with comprehensive security auditing into a unified diagnostic suite.
- • Email Health Suite: 4-pillar deliverability and anti-spoofing audit
- • 360° Health Audit: Complete infrastructure, web, DNS, and TLS scorecard
- • FYI Mail Tester: Active disposable inbox deliverability and SpamAssassin score
- • Cross-protocol correlation and unified 1-minute remediation action plans
- • One-click multi-engine query execution with zero telemetry noise
How to Use This Tool
To audit any domain or IP address, enter the hostname into the search box to run an instant parallel multi-resolver inspection.
- Select a diagnostic suite based on your triage goal (Email Health, 360° Audit, Mail Tester).
- Enter the target domain or hostname.
- Launch the unified scan to trigger all underlying diagnostic engines in parallel.
- Review the composite health grade, radar breakdown, and protocol findings.
Common Use Cases
dnsfyi is primarily used to troubleshoot email deliverability failures, verify global DNS propagation, and audit SSL certificate health.
- → Executive reporting on overall domain hygiene and security compliance.
- → Pre-migration baseline audit and post-migration verification.
- → Triage for sudden email delivery drops or domain blacklisting incidents.
Frequently Asked Questions
Find direct answers about dnsfyi's multi-resolver query engine, privacy policy, domain security checks, and free REST API.
- What is the difference between a standalone tool and a Suite Tool?
- Standalone tools (like /spf, /dmarc, or /ssl) evaluate a single record or parameter with deep CLI commands. Suite Tools (like /email, /mail-tester, and /360) orchestrate 6 to 13 underlying protocol engines simultaneously, generating unified health scores, cross-protocol correlation, and prioritized 1-minute remediation action plans.
- Which suite should I use to fix deliverability issues?
- Start with the Email Health Suite (/email) for a comprehensive passive audit of your DNS records (SPF, DKIM, DMARC, MTA-STS, DNSBL). Then, use FYI Mail Tester (/mail-tester) to send a real test email and verify that mailbox providers place your messages in the inbox.
- How does the 360° Domain Security Audit score my domain?
- The 360° audit allocates 100 total points across 4 critical domains: Web Defense Headers (30 pts), Email Anti-Spoofing (28 pts), DNS Resilience & Threat Feeds (22 pts), and SSL/TLS Encryption (20 pts). It tests adherence to zero-trust RFC standards.