G / TOOLS
Inspect the system. Read the signals.
Check DNS, certificates and email security. Open a focused tool, inspect the result and choose your next step.
Start with a certificate check
This opens SSL Checker for the domain you enter.
All tools
6 toolsSSL Checker
Check SSL certificate status, expiry and security grade.
Open toolDNS Lookup
Lookup DNS records, MX, SPF, DMARC and mail configuration.
Open toolWHOIS Lookup
Check domain owner, registrar and expiration date.
Open toolEmail Security
Test SMTP TLS, STARTTLS, SPF, DKIM, DMARC and MTA-STS.
Open toolEmail Header Analyzer
Parse email headers — delivery path, delays, TLS and spam analysis.
Open toolEmail Health
Complete email health score — DNS, auth, encryption and deliverability.
Open tool
What we check
Focused checks of public configuration, with findings and recommendations.
- SSL certificate validity and grade
- DNS records and configuration
- WHOIS and expiration dates
- Email security (SPF, DKIM, DMARC)
- Security issues and recommendations
What Gateway offers
Check your domain for free and get help with domain registration, DNS and email on your own domain. Contact support for next steps.
- Register and manage domainsContact support
- DNS for domains already linked to an organisation (ns1.nszone.se, ns2.nszone.se, ns3.nszone.org, ns4.nszone.org)Available now
- SSL certificatesContact support
- Email hostingContact support
Tool FAQs
- Are there free tools for DNS, SSL and email security?
- Yes, gateway.se offers free DNS lookup, SSL checking, WHOIS lookup, email security, email header analysis and email health tools. You can inspect domain settings and see detected issues.
- Do I need an account?
- No, the scans above require no account. Usage limits apply to the scans.
- What should I do if a tool finds SPF/DKIM/DMARC errors?
- Contact support for help with the next steps for SPF, DKIM or DMARC errors. DNS for domains at gateway.se is managed in the customer portal.
Know what you have. Fix what matters.
Create an account to log in. The scans above do not need an account.