Free Workspace and DNS tools
A set of free tools to inspect a domain: email security, mail servers, DNS records, certificates and handy utilities. Everything runs in your browser.
Email and delivery
Check email security (SPF, DKIM, DMARC, BIMI)
Check a domain SPF, DKIM, DMARC and BIMI in one report with a score.
Open the toolValidate SPF record
Check your SPF record for errors and the ten DNS-lookup limit.
Open the toolValidate DMARC record
Check your DMARC policy, reporting and alignment.
Open the toolCheck MX records
Which mail servers does your domain use? Detects Google Workspace and Microsoft 365.
Open the toolAnalyse email header
Paste an email header to see the route plus the SPF/DKIM/DMARC result.
Open the toolDNS and domain
Look up DNS records
All DNS records (A, AAAA, MX, TXT, NS, CNAME, CAA, SOA) for a domain.
Open the toolCheck DNS propagation
Do resolvers worldwide see the same records?
Open the toolWHOIS and domain information
Registrar, registration and expiry date, nameservers and status.
Open the toolCheck SSL certificate
Validity, expiry, issuer and hostname match of a certificate.
Open the toolInspect HTTP and security headers
Status, redirects and security headers of a URL.
Open the toolFollow a redirect chain
Follow the full redirect chain of a link.
Open the tool