DarkMX
About
Check a domain. Find the problem.
DNS, email authentication and web security results in one clean report.
Run diagnostics
Optional DKIM selector:
DNS
DNS lookup
Query a specific DNS record directly.
HDR
Header analyzer
Explain authentication and routing headers.
XML
DMARC report
Open aggregate XML, ZIP or GZIP reports.
TLS
SMTP TLS Tester
Check STARTTLS, TLS version and certificates.
WHO
WHOIS & Expiry
Check registrar, domain age and expiry dates.
TEL
Teams Telephony
Debug Microsoft Teams Direct Routing and SBC readiness.
TEN
Tenant Discovery
Find Microsoft 365 tenant IDs, domains and Entra tenant information.
IP
IP Intelligence
Network ownership, ASN, RDAP and reverse DNS lookup.
🌐
What Is My IP
View your public IP, location, ISP, timezone, browser and device details.
BL
Blacklist Intelligence
Check IP reputation across Spamhaus, SpamCop, Barracuda and other DNSBL providers.
SSL
SSL Intelligence
Check TLS versions, certificate chain and expiry.
SEC
Website Security Scanner
Analyse security headers, CSP, cookies, CORS, security.txt and TLS configuration.
RPT
TLS-RPT Analyzer
Analyze SMTP TLS reports in JSON or JSON.GZ format.
SPF
SPF Analyzer & Flattener
Analyze SPF records, count DNS lookups and generate flattened SPF records.
LOG
Entra Log Analyzer
Analyse Entra ID sign-in, audit and mailbox logs plus Conditional Access policies for password spray, BEC, risky admin changes and MFA gaps. Runs in your browser - nothing is uploaded.
PROP
DNS Propagation
Check if a DNS change has reached resolvers worldwide and in Iceland.
DNS lookup
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A
AAAA
MX
TXT
NS
SOA
CAA
SRV
CNAME
Lookup
Results appear here.
Email header analyzer
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Analyze headers
Results appear here.
TLS-RPT Analyzer
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Analyze TLS Report
Upload an RFC 8460 JSON or JSON.GZ report.
DMARC aggregate report
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Analyze
Reports are parsed locally by the app and are not stored.
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