Mailscope
Know what happens to an email before you send it.
One codebase, two tools. Start with unlimited free checks — syntax, DNS, MX, SPF/DMARC, provider detection — then escalate to SMTP-level verification only for the addresses that survive.
Email validator & mailbox detector
Free and unlimited, no API keys. RFC-strict syntax, IANA TLD check, provider mailbox rules, DNS/MX over DoH, SPF & DMARC, disposable and role detection, typo suggestions, plus provider and company-category classification.
Open validatorDebouncer / email verifier
Credit-based SMTP-level verification. One credit per verified address — dead addresses caught by the free layer cost nothing, and inconclusive lookups are refunded. Credits are topped up with crypto, from $6 per 1,000 emails.
Open debouncer