Free Online Tools¶

InteSys provides a suite of free online tools for diagnosing email deliverability issues, validating SSL certificates, and checking IP reputation. All tools are available at intesys.io/tools with no account required.

Available Tools¶

SSL Checker¶

Validate SSL/TLS certificates for any domain or hostname. Checks certificate validity, chain completeness, expiration dates, and protocol support including STARTTLS for mail servers.

→ SSL Checker Documentation

Email Auth Validator¶

Verify SPF, DKIM, and DMARC records for any domain. Identifies configuration errors, warns about common mistakes, and provides actionable recommendations.

→ Email Auth Validator Documentation

Multi-RBL Lookup¶

Check if an IP address or domain is listed on any of over 200 DNS-based blacklists (RBLs). Includes Forward-Confirmed Reverse DNS (FCrDNS) verification with real-time streaming results.

→ Multi-RBL Lookup Documentation

Why We Built These Tools¶

Email deliverability and server security are complex. Misconfigured DNS records, expired certificates, or blacklisted IPs can silently break email delivery or expose your services to attack. These tools provide instant, free diagnostics to help anyone — not just InteSys customers — maintain healthy infrastructure.

Using the Tools¶

All tools are web-based and require no installation or account:

1. Visit intesys.io/tools
2. Select the tool you need
3. Enter a domain, hostname, or IP address
4. Review the results

Integration with InteSys Services¶

These tools complement InteSys email and hosting products:

• Email Hosting customers can verify their DNS configuration using the Email Auth Validator
• Transactional Email users can confirm authentication setup and monitor IP reputation with Multi-RBL
• VPS customers can validate SSL certificates installed on their servers