Email Validator
Validate email syntax, detect typos, and flag disposable domains
About MX Record Verification
Full email validation requires checking MX (Mail Exchange) records via DNS lookup, which browsers cannot perform directly due to security restrictions.
To verify MX records, use a terminal command:
nslookup -type=MX example.comA valid response will show one or more mail server records like:
example.com MX 10 mail.example.comIf no MX records are found, the domain likely cannot receive emails even if the syntax is valid.
This tool validates email address syntax against RFC 5322 rules, detects common typos in popular domain names, and flags disposable email providers. It processes everything in your browser — no emails are sent or stored.
What Gets Checked
- Syntax validation: Local part rules (dots, special characters, quoted strings), @ symbol, domain format, TLD existence
- Typo detection: Common misspellings of Gmail, Hotmail, Yahoo, Outlook, and other major providers with “Did you mean?” suggestions
- Disposable domains: Flags temporary email providers like Mailinator, Guerrilla Mail, and TempMail that are often used for spam signups
- Bulk validation: Paste multiple email addresses (one per line) and validate them all at once
What This Tool Cannot Check
Browser-based email validation cannot verify whether an email address actually exists — that requires DNS MX record lookups and SMTP verification, which need server-side access. This tool validates the format and flags known issues, which catches the vast majority of invalid addresses.
Use Cases
- Form validation: Test your regex patterns against edge cases before deploying
- Mailing list cleanup: Quickly identify obviously invalid addresses, typos, and disposable domains
- Data quality checks: Validate email columns in CSV exports before import