# Email Armory > Free online tools for DNS lookup, email verification, DMARC/SPF/DKIM checks, SSL certificates, and domain security. 49+ tools, instant results, no signup required. ## About Email Armory is a free collection of DNS, email verification, and domain security tools for IT administrators, developers, email marketers, and business owners. All tools perform real-time DNS and SMTP queries — no cached or stale results. No account required. Website: https://emailarmory.com ## Tools ### Email Tools - [Email Verifier](https://emailarmory.com/tools/email-verifier): Check if an email address is valid and deliverable - [Bulk Email Verifier](https://emailarmory.com/tools/bulk-email-verifier): Verify up to 20 email addresses at once - [SMTP Banner Grabber](https://emailarmory.com/tools/smtp-banner): Reveal mail server software and SMTP greeting banner - [Email Header Analyzer](https://emailarmory.com/tools/email-header-analyzer): Parse and analyze raw email headers to trace routing and authentication - [Spam Score Tester](https://emailarmory.com/tools/spam-score): Analyze domain email configuration and get a heuristic spam risk score - [Open Relay Checker](https://emailarmory.com/tools/open-relay): Test if a mail server is an open relay - [MX Blacklist Check](https://emailarmory.com/tools/mx-blacklist): Scan all MX server IPs against major DNS blacklists - [Bounce Code Analyzer](https://emailarmory.com/tools/bounce-analyzer): Decode SMTP bounce codes and error messages ### DNS Tools - [DNS Lookup](https://emailarmory.com/tools/dns-lookup): Query all DNS records for any domain - [DNS Propagation Checker](https://emailarmory.com/tools/dns-propagation): Check if DNS changes have propagated across global servers - [MX Record Lookup](https://emailarmory.com/tools/mx-lookup): Find mail exchange servers for a domain - [NS Lookup](https://emailarmory.com/tools/ns-lookup): Find authoritative nameservers for any domain - [TXT Record Lookup](https://emailarmory.com/tools/txt-lookup): View all TXT DNS records including SPF, DKIM, and verification - [WHOIS Lookup](https://emailarmory.com/tools/whois-lookup): Get domain registration and ownership information - [Domain Age Checker](https://emailarmory.com/tools/domain-age): Check how old a domain is - [Reverse DNS Lookup](https://emailarmory.com/tools/reverse-dns): Find hostnames associated with any IP address via PTR records - [IP Geolocation Lookup](https://emailarmory.com/tools/ip-geolocation): Find the geographic location, ISP, and network info for any IP or domain - [Subnet Calculator](https://emailarmory.com/tools/subnet-calculator): Calculate subnet details from CIDR notation - [SOA Record Lookup](https://emailarmory.com/tools/soa-lookup): Check Start of Authority records - [AAAA Record Lookup](https://emailarmory.com/tools/aaaa-lookup): Look up IPv6 AAAA DNS records - [CNAME Record Lookup](https://emailarmory.com/tools/cname-lookup): Trace CNAME alias chains - [ASN Lookup](https://emailarmory.com/tools/asn-lookup): Find the Autonomous System Number and ISP for any IP or domain - [Bulk DNS Lookup](https://emailarmory.com/tools/bulk-dns): Check DNS records for up to 20 domains at once - [DNS Compare](https://emailarmory.com/tools/dns-compare): Compare DNS records of two domains side by side - [DNS Record Snapshot](https://emailarmory.com/tools/dns-timeline): Take snapshots of DNS records and track changes ### Security Tools - [Domain Health Check](https://emailarmory.com/tools/domain-health): Comprehensive email & DNS security report with health score - [Website Security Scanner](https://emailarmory.com/tools/website-scanner): Comprehensive security scan - [DMARC Checker](https://emailarmory.com/tools/dmarc-checker): Check DMARC policy and configuration for a domain - [SPF Checker](https://emailarmory.com/tools/spf-checker): Validate SPF records and email authentication setup - [SPF Flattener](https://emailarmory.com/tools/spf-flattener): Flatten SPF records to reduce DNS lookups - [DKIM Checker](https://emailarmory.com/tools/dkim-checker): Validate DKIM records and email signing configuration - [DKIM Selector Finder](https://emailarmory.com/tools/dkim-finder): Discover active DKIM selectors - [BIMI Record Checker](https://emailarmory.com/tools/bimi-checker): Verify BIMI brand logo configuration - [MTA-STS Checker](https://emailarmory.com/tools/mta-sts-checker): Verify MTA-STS email TLS enforcement - [DANE/TLSA Checker](https://emailarmory.com/tools/dane-checker): Verify DANE TLSA records - [CAA Record Checker](https://emailarmory.com/tools/caa-checker): Check which CAs can issue SSL certificates - [SSL Certificate Checker](https://emailarmory.com/tools/ssl-checker): Verify SSL/TLS certificate details and expiration - [Certificate Chain Checker](https://emailarmory.com/tools/cert-chain): Verify the complete SSL/TLS certificate chain - [TLS Version Checker](https://emailarmory.com/tools/tls-checker): Test which TLS versions a server supports - [Cipher Suite Scanner](https://emailarmory.com/tools/cipher-suite): Scan supported cipher suites and test for weak ciphers - [Blacklist Checker](https://emailarmory.com/tools/blacklist-checker): Check if your domain or IP is on email blacklists - [DMARC Record Generator](https://emailarmory.com/tools/dmarc-generator): Generate DMARC TXT records - [SPF Record Generator](https://emailarmory.com/tools/spf-generator): Create SPF TXT records - [DKIM Record Generator](https://emailarmory.com/tools/dkim-generator): Generate DKIM TXT records - [DNSSEC Checker](https://emailarmory.com/tools/dnssec-checker): Verify DNSSEC configuration - [HTTP Header Checker](https://emailarmory.com/tools/http-headers): Analyze HTTP response and security headers - [Security Headers Analyzer](https://emailarmory.com/tools/security-headers): A-F grading for security headers - [Redirect Checker](https://emailarmory.com/tools/redirect-checker): Trace the full HTTP redirect chain - [Port Scanner](https://emailarmory.com/tools/port-scanner): Check open SMTP, IMAP, POP3, and web ports - [Website Technology Detector](https://emailarmory.com/tools/tech-detector): Detect CMS, frameworks, analytics, CDN, and server software ## Content Resources - [Blog](https://emailarmory.com/blog): 49+ articles on email authentication, DNS, security, and deliverability - [Guides](https://emailarmory.com/guides): 32 step-by-step setup guides - [Glossary](https://emailarmory.com/glossary): 40+ DNS and email security terms explained - [Comparisons](https://emailarmory.com/compare): Side-by-side comparisons of protocols and tools ## Topic Hubs - [DMARC Hub](https://emailarmory.com/topics/dmarc): Everything about DMARC — tools, guides, articles - [SPF Hub](https://emailarmory.com/topics/spf): Everything about SPF - [DNS Hub](https://emailarmory.com/topics/dns): Everything about DNS records - [SSL/TLS Hub](https://emailarmory.com/topics/ssl): Everything about SSL/TLS certificates and encryption - [Email Deliverability Hub](https://emailarmory.com/topics/email-deliverability): Everything about reaching the inbox ## Full Documentation For comprehensive documentation, see [llms-full.txt](https://emailarmory.com/llms-full.txt)