Email Authentication Checker
Complete DNS & email security audit — check MX, SPF, DMARC, DKIM, TXT, NS, IPv6, detect providers, and get a security score with actionable recommendations
Complete Email Security Analysis
Check your entire email authentication setup in one click.
Analyze your domain's email security
Enter a domain to run a complete audit — MX records, SPF, DMARC, DKIM, TXT records, nameservers, and IPv6 — with a security score, provider detection, and actionable recommendations.
What is the Email Authentication Checker?
The Email Authentication Checker is a comprehensive, one-click audit of your domain's entire email and DNS security setup. Instead of running MX Lookup, SPF Checker, DMARC Checker, TXT Lookup, NS Lookup, and AAAA Lookup separately, this tool runs all six checks in sequence, aggregates the results into a single security score (0–100), identifies your mail provider, DNS provider, and security gateway, and generates prioritized, actionable recommendations.
Think of it as the GTmetrix of email authentication — one URL, one domain input, one comprehensive report. Every improvement made to the individual tools automatically benefits this dashboard, since it calls the same APIs under the hood.
How to Use
- 1Enter Your Domain:
Type any domain and click "Analyze Domain". The tool runs 6 checks progressively.
- 2Review Your Score:
A 0–100 score summarizes your email security across four categories: Authentication, DNS, Configuration, and Best Practices.
- 3Act on Recommendations:
Prioritized recommendations (High / Medium / Low) tell you exactly what to fix and why — from missing DKIM to SPF lookup overflows.
- 4Deep-Dive & Export:
Expand any section for details, click through to the full dedicated tool, or export the report as CSV / JSON.
What Gets Checked
Pro Tips
Fix High Priority First
The recommendations are sorted by impact. A missing SPF or DMARC record is a bigger risk than relaxed alignment — tackle the reds before the yellows.
Run After Every Change
After adding a new ESP, changing DNS providers, or tightening DMARC, re-run this tool to verify your score improved and no new warnings appeared.
Share the Report
Export the JSON or CSV and attach it to a support ticket, compliance audit, or client proposal. The score gives stakeholders a single number to track.
Real-World Applications
IT Admin Weekly Check
Run it every Monday on your primary domains. If the score drops, something changed — new ESP, expired DNS, or a misconfigured SPF flatten.
Vendor Due Diligence
Check a vendor's domain before onboarding. A low email auth score means their domain is easily spoofable — a phishing risk to your org.
Client Deliverables
MSPs and consultants: export the report, attach it to an engagement proposal, and show the client exactly what needs fixing — scored and prioritized.
Individual Tools
MX Record Lookup
Deep-dive into mail servers, provider detection, and email authentication.
SPF Record Checker
Validate SPF, count lookups, parse mechanisms, and visualize the include tree.
DMARC Checker
Analyze DMARC policy in plain English with alignment and reporting checks.
TXT Record Lookup
Classify all TXT records and detect 40+ connected services.
NS Lookup
Health-check nameservers, detect DNS provider, verify consistency.
DNS Propagation Checker
Check DNS propagation across 20 global resolvers.
The Email Authentication Checker is the most comprehensive free email security audit available — it checks everything (MX, SPF, DMARC, DKIM, TXT, NS, IPv6), scores the result, detects your providers, and tells you exactly what to fix in priority order. Run it once to understand your posture, run it again after every change to verify. No sign-up, no API key, no cost.
More Networking Tools
DMARC Checker
Check and validate DMARC records, analyze email authentication policies, verify SPF and DKIM alignment, and improve domain email security.
MX Record Lookup
Check mail servers, detect the email provider and security gateway, verify SPF/DMARC/DKIM, and get a DNS health score for any domain.
SPF Record Checker
Validate SPF records, count DNS lookups against the 10-lookup limit, parse mechanisms, detect providers, and get a security score.
DNS Propagation Checker
Check DNS propagation across global DNS resolvers for A, AAAA, CNAME, MX, TXT, NS, SOA, PTR, and CAA records with real-time propagation status.
TXT Record Lookup
Look up all TXT records for any domain, classify each record, detect 40+ connected services, check email authentication, and export results.
A Record Lookup
Look up A records for any domain, view IPv4 addresses, TTL, geographic location, hosting provider, reverse DNS, and autonomous system (ASN) information.