Free tools
Free email and domain tools
Check an address, look up a domain's DNS or test your list. No sign-up for any of them.
Email checker
Check one address and see if it is Deliverable, Risky or Undeliverable, with the reason.
Open toolDisposable email checker
Find out if an address comes from a throwaway inbox service.
Open toolCatch-all checker
Find out if a domain accepts mail for every address, real or not.
Open toolEmail syntax checker
Check that an address is written correctly before you save it.
Open toolDomain and DNS
MX lookup
See which mail servers receive email for a domain, in priority order.
Open toolSPF checker
Find a domain's SPF record and see which services are allowed to send email for it.
Open toolDKIM checker
Find a domain's DKIM public key.
Open toolDMARC checker
Read a domain's DMARC policy and see what receivers do with mail that fails SPF and DKIM.
Open toolChecking more than a few?
Upload a CSV and verify every address with all six checks. Start with 200 free credits.
Check your list before you send it
Start with 200 free credits. Pay per credit after that.