Free tool
Email checker
Check whether an email address is valid: syntax, domain, MX, disposable and role.
Free toolVerification cost calculator
What verifying 5K to 1M emails costs at the big-name verifiers and in Instantly or Smartlead.
Free toolBounce rate calculator
Your bounce rate, and whether Instantly, Smartlead or lemlist would pause you.
Free toolDisposable email checker
Is this a temporary, throwaway inbox? Check against thousands of providers.
Free toolList sampler
Paste a list, check a random sample, and estimate how much of it is dead.
Free toolSPF, DKIM and DMARC checker
Check up to 25 sending domains at once: SPF (with the 10-lookup limit), DKIM, DMARC and MX.
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