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Email Validator

Developer

Validate email addresses for correct format and check domain MX records for deliverability.

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Email Address
Validation Result
Enter an email address to validate

An email address can look perfectly valid, correct syntax, a plausible domain, an @ symbol in the right place, and still bounce the moment something is actually sent to it, because a typo'd domain like gmial.com passes every formatting check while having no mail server configured to receive anything at all. This tool checks an email address's format and then looks up whether its domain actually has MX records configured, catching the gap between looking valid and being deliverable.

See more about the Email Validator

Useful for catching a mistyped domain before it silently bounces a signup confirmation, checking a list of collected addresses for ones with no mail server behind them, or confirming a business email domain is actually set up to receive mail before relying on it.

Key features

  • Clean interface
  • Fast processing
  • No signup required
  • Works offline

Quick answers for Email Validator

Does it check whether the email address actually exists?
No, it only checks the format, things like local part length, domain length, and allowed characters, not whether the mailbox is real or receives mail.
What specific rules does it check?
Presence of exactly one @, a local part under 64 characters with valid characters, and a domain under 253 characters matching valid hostname label formatting.
What does it tell me when an email is invalid?
A specific reason, such as a missing @ symbol, invalid characters in the local part, or an invalid domain format.