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mark_email_read Format Validator

Email Validator

Validate email address format and syntax according to RFC standards. Check single emails or validate in bulk.

Single Email Validation

Bulk Email Validation

What Makes a Valid Email?

check_circle Valid Examples

cancel Invalid Examples

  • close user@ (no domain)
  • close @example.com (no local part)
  • close user@example (no TLD)
  • close user [email protected] (space)

Email Format Rules (RFC 5321)

Local Part (before @)

Can contain letters, numbers, dots, hyphens, underscores, and plus signs. Cannot start or end with a dot.

Domain Part (after @)

Must be a valid domain name with at least one dot. Can contain letters, numbers, and hyphens.

Top-Level Domain

Must be at least 2 characters. Common TLDs include .com, .org, .net, and country codes like .uk, .de, .ru.

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