Free email verifier
Check any address in seconds — format, MX records, disposable domains and role accounts, with a deliverability score. No signup, and we never send an email.
RFC-aware format validation catches malformed addresses.
Confirms the domain publishes mail servers that can receive email.
Flags throwaway inboxes from temporary email services.
Detects info@, support@ and other shared addresses.
How to read the result
Mailbox confirmed by a live SMTP check. Safe to send.
Warning signs — role account, disposable domain, catch-all, or a mailbox that couldn't be confirmed.
Will bounce. Bad format, no mail servers for the domain, or the mail server said the mailbox doesn't exist.
The check couldn't complete (DNS or SMTP didn't answer). Try again in a moment.
Frequently asked questions
Yes. The single-address checker is free and requires no account. Sign up free for 500 verification credits to clean CSV lists and use the API — credits never expire.
No. ClearMX never sends email. We check the address format, the domain's DNS and MX records, and known disposable providers.
Deliverable means the mail server confirmed the mailbox exists. Risky means warning signs — a role account, disposable domain, or a mailbox we couldn't confirm (some providers block verification probes). Undeliverable means it will bounce. Unknown means the check couldn't complete.
Yes — create a free account, upload a CSV, and download a cleaned list with a result for every row.
Create a free ClearMX account to clean CSV lists, verify by API, and get 500 free verification credits — they never expire.
Learn more: What is email verification? · How to reduce bounce rate · Email verification API