Free IT Diagnostic Tools
Professional-grade tools for checking email authentication, DNS propagation, and blacklist status. No signup required.
Email Health Checker
Check SPF, DKIM, DMARC, BIMI, and MTA-STS configuration for any domain. Get actionable recommendations.
DNS Propagation CheckerComing Soon
Check if your DNS changes have propagated across global DNS servers.
Blacklist CheckerComing Soon
Check if your IP address or domain is listed on any major email blacklists.
About These Tools
These tools perform live DNS lookups to check your domain's configuration. All checks are based on publicly available DNS records - no authentication or special access is required.
Privacy: We don't store any domain names you check or the results. Each lookup is performed fresh and results are only shown to you.
Rate Limiting: To ensure fair usage, these tools are limited to 30 checks per minute per IP address.