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Check your domain’s email protection | DemiSignal
Check the email settings that help protect your domain. Find missing or weak SPF and DMARC records, then monitor reported traffic with a paid plan.
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87 % |
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Domain Detective — check any domain's DNS, web and email setup
Check the public records behind any domain — DNS, HTTPS certificates, security headers, email protection and registration — and get alerted when they change.
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87 % |
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SSL, DNS & Domain Expiry Checker — free domain health check
Check your SSL certificate, DNS propagation, and domain registration expiry in one scan — and find out why anything is broken. Free, no signup, nothing stored.
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86 % |
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Marchpost — External attack surface monitoring for MSPs
See every client domain from the outside in one dashboard. Email authentication, certificates, DNS and website hardening — with white-label reports your clie...
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85 % |
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Email diagnostics and repair, backed by evidence
Find why your email goes to spam. Free DNS and header diagnostics, authentication repair from $149, and deliverability rescue from $299, with a clear plan an...
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85 % |
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Veritsu — Domain security checks
Free external security checks for any domain — email authentication, SSL/TLS, security headers and security.txt — with a plain-English fix for anything that...
|
85 % |
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Email DNS Checker
Scan public DNS records to diagnose custom domain email setup problems across MX, SPF, DKIM, and DMARC.
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85 % |
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Domain Posture — see what your domain exposes
Scan any domain's external security posture free — DNS, email auth, TLS, headers, and AI-crawler policy. DNS-verify to run a deep scan for exposed secrets. F...
|
85 % |
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Vahti, domain security for small business
We watch your domain and DNS records around the clock and alert you as soon as anything changes, before a hijack can do real damage.
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85 % |
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Multi-Domain Website Monitoring | HelpFixMySites
Manage your websites in one place. Compare health scores, spot changes every 12 hours, and turn findings into clear next steps.
|
85 % |
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SCANCOMPASS
A free external security assessment for your website: understandable findings, plain-English explanations, and concrete remediation guidance.
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84 % |
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|
84 % |
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Nexpiry — Free Domain Monitoring & SSL Monitor
Nexpiry is a free domain monitoring tool that watches your domains, SSL certificates, and DNS records 24/7. Get alerted before anything expires — so your sit...
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84 % |
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DotDeeper - Free Domain, DNS & SSL Monitoring
Free domain monitoring for DNS, nameservers, SSL certificates, and SPF/DKIM/DMARC email auth. Instant alerts the moment something changes.
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84 % |
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FreeMailTesting
Check SPF, DKIM, and DMARC records free with clear results and practical next steps.
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84 % |
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Perimeter — External Attack Surface Management
Perimeter continuously discovers and monitors everything your business exposes to the internet. Findings management, risk register, intelligence feeds, and b...
|
84 % |
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DomainRisk.io — Continuous Domain Security Monitoring
Monitor WHOIS, DNS, SSL and email security across your domain portfolio with an explainable risk score, subdomain takeover detection, change alerts and audit...
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84 % |
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Free SSL Certificate & Domain Security Checker | CertNotify
Free SSL checker, domain expiry monitor and DNS lookup tools. Track certificate security, DNSSEC health and email authentication, with alerts before expiry.
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84 % |
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Lapse. Don't let your SSL or domain lapse.
Check SSL certificate and domain registration expiry in seconds. Free, no signup. Paid monitoring with email alerts when SSL, domain, or blacklists need atte...
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84 % |
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DMARC Monitoring That Tells You What to Fix | DomainGuard
DomainGuard turns DMARC reports into named senders, pass rates, spoofing alerts, and clear DNS recommendations. Start free on the web.
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84 % |
Detected social media networks