Free Tools
Email & DNS tools.
A free toolbox for diagnosing email deliverability and DNS. Check SPF, DKIM and DMARC, look up MX records, WHOIS, nameservers and IP addresses — no signup required.
SPF Checker
Look up and validate a domain's SPF record.
SPF Generator
Build a valid SPF record from your mail sources.
MX Lookup
Find the mail servers that accept mail for a domain.
DKIM Checker
Retrieve and inspect a DKIM public key by selector.
DMARC Lookup
Check a domain's DMARC policy and reporting setup.
IP Lookup
Resolve an IP or hostname and geolocate it.
WHOIS Lookup
Query registration details for a domain or IP.
NS Lookup
List nameservers and query DNS records for a domain.
Protect your own domain
Cleanbox combines aliases, spam filtering and deliverability tools in one inbox. Free plan available, no credit card required.
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