Validate emails
One address or one per line. Checks run live.
Validate emails with the Email Validator: syntax checks for single or bulk lists, plus an optional MX record lookup.
One address or one per line. Checks run live.
Each address is tested against practical email rules: exactly one @, valid characters, no leading/trailing or doubled dots, label lengths, and a plausible TLD. These catch typos like gmial or doubled dots, which a naive regex misses.
With MX checking on, the domain is queried over DNS (via Cloudflare's DNS-over-HTTPS) for mail servers. A domain with no MX records cannot receive mail, so the address is almost certainly wrong or dead. Syntax alone cannot tell you that.