Email Address Validator
Check email addresses for syntax, a real domain and MX records, disposable and role accounts and common typos, one at a time or in bulk.
Check one address or paste a whole list. Syntax, domain and MX records are checked live — no message is ever sent, so a passing address is well-formed and reachable, not confirmed to exist.
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This tool checks syntax, the domain and its MX records. It never connects to the mail server, so it cannot confirm that a particular mailbox exists — only that the address is well-formed and its domain is set up to receive mail.
| Address | Verdict | Domain | First MX | Flags | Did you mean |
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This tool checks syntax, the domain and its MX records. It never connects to the mail server, so it cannot confirm that a particular mailbox exists — only that the address is well-formed and its domain is set up to receive mail.
About Email Address Validator
The Email Address Validator checks an address the way a careful mail system would before accepting it. It parses the address against the RFC 5321/5322 grammar rather than a naive pattern, so it correctly handles plus addressing, quoted local parts and international domains, and correctly rejects consecutive dots, over-length local parts, display names pasted in by mistake and domains with no real top-level domain.
It then looks the domain up live: MX records first, falling back to the address record that RFC 5321 treats as an implicit mail server. On top of that it flags addresses that are technically fine but a poor bet — known disposable and throwaway providers, role accounts such as info@, admin@ or support@ that reach a shared mailbox and engage badly, and free consumer providers on a business list. Near-miss domains get a suggestion, so gmial.com is caught before it costs you a customer.
What it deliberately does not do is open an SMTP session to ask whether a mailbox exists. That kind of probing is unreliable — catch-all domains accept everything, greylisting delays everything, and repeated probes get your IP blocked. So a passing address here means "well-formed, and its domain is set up to receive mail", never "this mailbox exists". The bulk tab applies the same checks to a pasted list, removes duplicates, and exports the results as CSV.
How to use Email Address Validator
- Enter a single address on the first tab, or switch to the bulk tab and paste a list, one per line.
- Read the per-check panel: syntax, domain, mail servers, disposable domain and role account are reported separately.
- Act on any typo suggestion — a domain one or two characters from a major provider is almost always a mistake.
- Review the flags: disposable addresses expire within hours, and role accounts are usually worth excluding from marketing lists.
- Download the CSV from the bulk tab to feed the results back into your CRM or mailing list.
- Remember the limit: passing addresses are reachable, not confirmed. Only sending to one proves the mailbox exists.