Email Validator
Validate email addresses
Frequently Asked Questions
How does email validation work?
The validator checks email format against RFC 5322 standards: valid characters, proper @ placement, valid domain structure, and TLD existence. It catches common errors like missing @, double dots, spaces, and invalid characters.
Does the validator check if an email actually exists?
The basic validator checks format only. It verifies the syntax is valid and the domain has MX records (mail server configured). It does not send a test email or verify the specific mailbox exists, as that requires SMTP verification.
What are common email format errors?
Missing @ symbol, spaces in the address, consecutive dots (john..doe@), missing domain extension, invalid characters (!#$ in wrong positions), and exceeding length limits (64 chars local, 255 chars total).
Can I validate a list of emails at once?
Yes. Paste multiple emails (one per line) and the validator checks each one. Results show valid/invalid status for each address with specific error descriptions. You can export the clean list of valid emails.
Does the validator detect disposable email addresses?
Yes. The validator flags known disposable/temporary email domains (like mailinator.com, guerrillamail.com). These addresses are often used for spam or to bypass registration. The database covers 3,000+ disposable domains.