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Available tools
The free toolkit includes SuperTool, SPF record checker, DMARC analyzer, DKIM checker, BIMI checker, MTA-STS checker, TLS-RPT checker, MX lookup, DNS records lookup, SSL certificate grade checker, WHOIS lookup, ASN/IP lookup, reverse DNS lookup, and email header analyzer.
When to use them
Use the tools for one-off diagnostics before adding a host to scheduled monitoring, or when you need to inspect DNS, authentication, certificate, or message-header state quickly.