Free Email Verifier & Email Verification API | InboxVet

# InboxVet > InboxVet (inboxvet.com) verifies email addresses before you send: syntax, domain and MX records, disposable addresses, the mailbox itself over SMTP, and catch-all domains, without sending any email. It also offers free email deliverability tools: an email server and DNS test, a Spamhaus blacklist check, blacklist monitoring and DMARC report monitoring. Formerly PilotVerify (pilotverify.net). Operated by PILOTLAB LLC. ## Free - [Free email verifier](https://inboxvet.com/free-email-verifier): verify any email address for free, including the mailbox (SMTP) and catch-all check. 3 free checks a day without an account or credit card. - Free account: 100 free verification credits on sign-up (one credit verifies one address), usable for CSV list uploads or the API. [Sign up](https://inboxvet.com/auth/signup). - [Free email server and DNS test](https://inboxvet.com/tools/email-server-test): MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI and reverse DNS, scored out of 100 with a fix list. Unlimited with a free account. - [Free email blacklist check](https://inboxvet.com/tools/blacklist-check): look up a domain or IP on the Spamhaus ZEN, DBL and ZRD blocklists and see what a listing means. - [Free blacklist monitoring](https://inboxvet.com/blacklist-monitoring): scheduled Spamhaus checks with an email alert when a listing appears; 3 domains or IPs free. - [Free DMARC monitoring](https://inboxvet.com/dmarc-monitoring): readable DMARC aggregate reports (who sends as your domain, SPF/DKIM pass rates, spoofing); 1 domain free. ## Pricing - [Pricing](https://inboxvet.com/pricing): email verification is pay-as-you-go. Credits never expire and there is no monthly fee for verification. ## Developers - [API documentation](https://inboxvet.com/docs): REST API with an x-api-key header. POST /api/validate checks one address; POST /api/validate/batch checks up to 1,000. Results: VALID, INVALID, RISKY (disposable or catch-all) or UNKNOWN. ## Company - [Contact](https://i