RemoteITSupport.online

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Free IT Tools & Diagnostics

Check domain and email configurations with actionable results. All tools are free; expert help is always optional.

Run the complete domain check

Available tools

Live DNS checkDomain & Email Health Check

SPF, DMARC, MX, DNS and optional DKIM selector analysis in one report.

Live DNS checkSPF Checker

Review SPF policy and basic configuration warnings.

Live DNS checkDMARC Analyzer

Inspect published DMARC policy and enforcement.

Live DNS checkMX Record Lookup

View mail exchanger hosts and priorities.

Live DNS checkDNS Lookup

Inspect nameservers and domain address records.

Live HTTPS checkSSL Certificate Checker

Verify TLS trust and hostname.

Live HTTPS checkWebsite Availability Checker

Check HTTPS response from this server.

Live HTTPS checkHTTPS Redirect Checker

Inspect HTTP status and redirect location.

Live HTTPS checkSecurity Headers Checker

Inspect HSTS, CSP and other security headers.

Private browser toolEmail Header Analyzer

Inspect reported SPF, DKIM and DMARC results from pasted message headers.

What comes next?

More practical tools will be added after validation. These checks are free and expert assistance is optional.

Free DNS, email and website troubleshooting tools

Use our free online checks to inspect SPF, DKIM, DMARC, MX records, DNS settings, SSL certificates, website availability and security headers. Each diagnostic tool helps explain the published technical information so you can identify the next step.

Common checks for email deliverability

Start with a DMARC lookup, review your SPF record, and check MX records. For a broader view, use the Domain & Email Health Check.

Website troubleshooting

Check SSL certificate status, website availability, and security headers. For hands-on assistance, see our IT support services.

Need help fixing a problem found by these tools?

Our free checks help you identify public DNS and website issues. For configuration changes or troubleshooting, explore our Google Workspace support, Microsoft 365 support, SPF, DKIM and DMARC setup, email deliverability services, and web hosting support.