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Free DNS lookup, email verification, DMARC/SPF checks, SSL certificates, and more. Everything you need to secure and verify your email infrastructure.
Type a domain for a health check, or an email to verify it. No signup required.
Check if an email address is valid and deliverable
Reveal mail server software and SMTP greeting banner for any domain
Parse and analyze raw email headers to trace routing and authentication
Analyze domain email configuration and get a heuristic spam risk score
Test if a mail server is an open relay that could be abused for spam
Scan all MX server IPs against 7 major DNS blacklists
Decode SMTP bounce codes and error messages with actionable solutions
Verify up to 20 email addresses at once. Check syntax, MX records, disposable domains, and risk score
Query all DNS records for any domain
Check if DNS changes have propagated across global servers
Find mail exchange servers for a domain
Get domain registration and ownership information
Check how old a domain is with registration, expiry, and registrar details
Find hostnames associated with any IP address via PTR records
Find the geographic location, ISP, and network info for any IP or domain
Calculate subnet details from CIDR notation or IP + subnet mask
Find authoritative nameservers for any domain
View all TXT DNS records including SPF, DKIM, and verification
Check Start of Authority records with serial, refresh, retry, and expire values
Look up IPv6 AAAA DNS records and check dual-stack support for any domain
Trace CNAME alias chains and resolve the canonical hostname for any domain
Find the Autonomous System Number, network operator, and ISP for any IP or domain
Check DNS records, SPF, and DMARC for up to 20 domains at once
Compare DNS records of two domains side by side
Take snapshots of DNS records and track changes over time
Comprehensive email & DNS security report with health score
Comprehensive security scan: SSL, headers, HTTPS redirects, and open ports
Check DMARC policy and configuration for a domain
Validate SPF records and email authentication setup
Flatten SPF records to direct IPs and reduce DNS lookups
Validate DKIM records and email signing configuration
Verify BIMI brand logo configuration and VMC certificate
Verify MTA-STS email TLS enforcement, policy file, and TLSRPT configuration
Verify DANE TLSA records for DNS-based certificate authentication
Check which Certificate Authorities can issue SSL certificates for a domain
Verify SSL/TLS certificate details and expiration
Check if your domain or IP is on email blacklists
Analyze HTTP response headers and security header configuration
Trace the full HTTP redirect chain for any URL with status codes and timing
Check open SMTP, IMAP, POP3, and web ports on any domain
Test which TLS protocol versions (1.0, 1.1, 1.2, 1.3) a server supports
Generate DMARC TXT records with policy, reporting, and alignment settings
Create SPF TXT records with authorized senders, IPs, and lookup validation
Generate DKIM TXT records with selector, key type, and hash algorithm settings
Detect CMS, frameworks, analytics, CDN, and server software on any website
Discover active DKIM selectors by scanning 30+ common selector names
Verify the complete SSL/TLS certificate chain with expiration and algorithm checks
Analyze HTTP security headers with A-F grading for HSTS, CSP, X-Frame-Options, and more
Verify DNSSEC configuration, DNSKEY and DS records, and chain of trust validation
Scan supported SSL/TLS cipher suites and test for weak ciphers and forward secrecy
Instant security reports for the most popular email and web domains.
Practical guides on email security, DNS, and deliverability.
Email Armory provides free, instant DNS and email security tools built for IT professionals, developers, and business owners who need reliable results without the clutter.
All tools are 100% free with no signup, no limits on basic usage, and no paywalls. Just enter a domain and get results.
Real-time DNS queries and live certificate checks. No queuing, no waiting — results appear in milliseconds.
We don't store your queries or results. Your lookups are processed in real time and never logged.
Google and Yahoo now require DMARC for bulk senders. Check your DMARC, SPF, and DKIM setup to avoid deliverability issues.
Designed for sysadmins, DevOps engineers, email marketers, and security teams who need clean, actionable data.
From DNS records to SSL certificates, email verification to WHOIS — all the tools you need in one place.
Pick from our suite of DNS, email, and security tools above.
Type in the domain name or email address you want to check.
View detailed results with actionable insights and recommendations.
With Google and Yahoo enforcing DMARC authentication, every business needs properly configured email records. Use our free tools to verify your setup.
Email Armory is a free collection of DNS, email verification, and domain security tools designed for IT administrators, DevOps engineers, email marketers, and business owners. Whether you need to verify an email address, look up DNS records, check your DMARC policy, or inspect an SSL certificate, our tools deliver instant, accurate results.
In an era where email deliverability can make or break your business communication, having the right tools at your fingertips is essential. Major email providers like Google and Yahoo have tightened their authentication requirements, making DMARC, SPF, and DKIM compliance mandatory for bulk senders. A misconfigured DNS record or expired SSL certificate can lead to emails landing in spam, rejected connections, or security vulnerabilities.
Our tools query live DNS servers, establish real TLS connections, and contact WHOIS databases in real time — giving you the most up-to-date information about any domain. Unlike static analysis tools, Email Armory performs actual network lookups so you can trust the results.