Terms of Service

By accessing or using SysAdmin Tools, you agree to be bound by these Terms of Service. If you disagree with any part of these terms, please do not use our services.

SysAdmin Tools provides free online diagnostic tools including DNS lookups, SSL certificate checking, WHOIS lookups, email record verification (SPF, DKIM, DMARC), port checking, security header analysis, and related network diagnostics. All tools are provided as-is for informational purposes only.

You may use our tools for:

• ✓Checking your own domains and servers
• ✓Diagnosing DNS and network issues
• ✓Verifying email security configuration
• ✓Educational and research purposes

You may not use our tools for:

• ✗Automated scraping or bulk querying of our services
• ✗Any illegal activity or unlawful purpose
• ✗Attacking, probing or scanning systems you do not own or have explicit permission to test
• ✗Circumventing any security measures
• ✗Redistributing our tool output commercially without permission

To ensure fair access for all users, we may limit the number of requests from a single IP address. Excessive or automated use may result in temporary blocking of your IP at our discretion.

Results are provided in real-time from authoritative sources including Cloudflare DNS, Google DNS, and public WHOIS servers. However, we make no warranties about the accuracy, completeness, or reliability of results.

Do not make critical business or infrastructure decisions based solely on our tool output. Results may differ based on your location, ISP, DNS resolver, or propagation state. Always verify with additional sources.

SysAdmin Tools and all tools on this platform are provided “as is” without any warranty of any kind, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement. We do not guarantee uninterrupted or error-free service.

SysAdmin Tools shall not be liable for any direct, indirect, incidental, special, consequential, or exemplary damages arising from your use of, or inability to use, our tools or services — even if we have been advised of the possibility of such damages. This includes but is not limited to loss of data, loss of revenue, or business interruption.

The SysAdmin Tools website, design, branding, and original content are protected by copyright. You may not reproduce, distribute, or create derivative works from our interface without prior written permission.

Tool output data — including DNS records, WHOIS information, and SSL certificate details — is sourced from public systems and is not our intellectual property.

Our website may contain links to external websites or resources. We are not responsible for the content, privacy practices, or availability of those external sites and accept no responsibility for them or for any loss or damage that may arise from your use of them.

We reserve the right to modify these Terms of Service at any time without prior notice. Changes will be posted on this page with an updated date. Your continued use of SysAdmin Tools after any changes constitutes your acceptance of the revised terms.

These terms are governed by applicable law. Any disputes arising under these terms shall be resolved through good-faith negotiation between the parties.