DNS checker

Updates
  • 10/2 2026

    New features

    V2 is now the default version

    • Added dynamic provider loader (loadProviders())
    • Added dynamic subdomains loader (loadSubdomains())
    • Moved provider fingerprints to versioned config files
    • Moved subdomains to versioned config files
    • Merged legacy Unoeuro signals into Simply.com detection
    • Merged all 4/2 release notes into one
  • 4/2 2026

    New features

    • Added advanced multi-signal email provider detection
    • Added provider confidence scoring (Low / Medium / High)
    • Expanded provider fingerprint database with support for 25+ infrastructure and email providers
    • Added DKIM signal support to provider detection for improved accuracy
    • Added combined detection using SPF, MX, DKIM and Nameserver patterns
    • Added Email Security Score (0–100 rating based on SPF, DKIM and DMARC configuration)
    • Added automatic email provider detection (Microsoft 365, Google Workspace, Cloudflare)
    • Added DKIM key verification to detect missing or invalid DKIM TXT records
    • Added Email Security Summary overview for faster domain health assessment
    • Added detailed Email Security Analysis tabs for SPF, DKIM and DMARC
    • Redesigned Provider Detection layout using responsive grid
    • Standardized full-width alignment across all result panels
    • Fixed layout mismatches between Email Security, Provider Detection, Raw DNS, and Updates sections
    • Improved Email Security status labels and DMARC policy display
    • Improved DKIM summary display using selector count
    • Improved Bootstrap grid structure and viewport rendering stability
    • Fixed provider stacking on large desktop resolutions
    • Fixed multiple layout-related 500 errors caused by broken HTML block structure

    Improvements

    • Improved email authentication visibility and diagnostics
    • Improved detection of misconfigured email security records
    • Improved domain security overview with severity-based status indicators
    • Improved DNS result layout with clearer separation between analysis and raw DNS data

    Detection Improvements

    • Improved detection accuracy for Microsoft 365 environments
    • Improved detection accuracy for Google Workspace environments
    • Improved Cloudflare infrastructure detection
    • Improved detection of email security gateway providers (Proofpoint, Mimecast, Barracuda, Cisco)
    • Improved detection of transactional email providers (SendGrid, Mailgun, Amazon SES, SparkPost, Postmark)

    Security & Diagnostics Improvements

    • Improved identification of mixed-provider infrastructure setups
    • Improved visibility into underlying email platform architecture
    • Improved detection reliability across complex DNS configurations

    Technical improvements

    • Introduced configuration-based provider fingerprint database
    • Added extensible provider detection framework for future provider additions
    • Improved provider detection performance by using existing DNS query data (no additional lookups required)
    • Added modular email security analyzer framework for future feature expansion
    • Improved DNS validation and lookup handling
    • Improved overall reliability of DNS processing