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Server configuration, email delivery, and security compliance all depend on correct DNS records, valid certificates, and clean reputations. Email Armory gives you free, instant tools to audit domain health, scan ports, check blacklists, verify SSL, and inspect security headers — without installing agents or signing up for yet another monitoring platform.
Email infrastructure is unforgiving. A single misconfigured PTR record can get your entire mail server blacklisted. An expired SSL certificate breaks SMTP TLS negotiation silently. A missing SPF include means your organization's emails go straight to spam — and nobody tells you until it's already a problem.
These tools give you an external view of your infrastructure — the same view that receiving mail servers, security scanners, and compliance auditors see. No CLI required, no SSH tunnel needed. Just enter a domain and get instant, actionable results.
The tools sysadmins reach for most — all free, no signup required.
Comprehensive email & DNS security report with health score
Check open SMTP, IMAP, POP3, and web ports on any domain
Verify SSL/TLS certificate details and expiration
Find hostnames associated with any IP address via PTR records
Check if your domain or IP is on email blacklists
Get domain registration and ownership information
Analyze HTTP response headers and security header configuration
Parse and analyze raw email headers to trace routing and authentication
Before and after migrating mail servers, verify DNS records, reverse DNS, MX priorities, SSL certificates, and open ports. Catch misconfigurations before users report them.
When email delivery fails or users report bounces, quickly check blacklists, verify DNS propagation, inspect email headers for routing issues, and confirm SMTP ports are reachable.
Audit DMARC, SPF, and DKIM configurations against organizational policy. Verify HTTP security headers (HSTS, CSP, X-Frame-Options) meet compliance requirements.
Regularly check SSL certificate expiration, blacklist status, domain health scores, and DNS record integrity. Detect issues before they impact email delivery or security posture.
Browse all 17 free tools — DNS, email, and security — no signup required.
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