Free tools
for email, DNS and IPs.
Run a quick email, DNS or IP check. Choose a tool, enter a value and review the results without creating an account or spending credits.
Check email syntax and spot disposable email providers.
Domain and DNS
Review mail servers, email authentication, blocklists and public domain records.
MX record lookup
Find the mail servers configured to receive email for a domain.
Open toolSPF record checker
Check whether a domain publishes an SPF record and review its basic configuration.
Open toolDMARC record checker
Look up a domain’s published DMARC policy and its basic configuration.
Open toolDKIM record checker
Look up the DKIM key published for a domain and selector.
Open toolEmail blacklist checker
Check a domain’s IP addresses against Spamhaus ZEN and SpamCop.
Open toolWHOIS and RDAP lookup
Look up public domain registration and expiration details through RDAP.
Open toolIP
Review network information and IP reputation signals.
From one check to thousands, with clear results.
Use our API to add verification to your forms and workflows. Start with 500 welcome credits.