Email Validator
Validate email syntax, domain structure, MX records, and detect disposable addresses.
Free & unlimited
Mode
Email address
Validation runs in your browser. MX record checks query Cloudflare DNS over HTTPS.
About this tool
- 1
Enter an email address
Type or paste the email address you want to validate.
- 2
Check syntax
The tool verifies the address follows correct email formatting rules (RFC 5322).
- 3
Verify MX records
The tool queries DNS to confirm the domain has valid mail exchange servers configured.
- Validate emails before adding them to mailing lists to reduce bounce rates.
- A valid syntax does not guarantee the mailbox exists; MX verification confirms the domain can receive mail.
- Batch-validate a list of addresses by pasting them one per line.
- RFC-compliant email syntax validation
- DNS-based MX record verification for the domain
- Detection of common typos and disposable email providers
- Batch validation for multiple addresses at once
- Clean mailing lists by removing addresses with invalid syntax or dead domains
- Validate user-submitted emails during form registration before sending confirmation
- Identify disposable or temporary email addresses in sign-up flows
- Audit CRM contact databases for deliverability issues
No. Syntax and MX checks confirm the address is well-formed and the domain can accept mail, but the specific mailbox may not exist or may be full.
Disposable emails come from services that provide temporary inboxes (e.g., Mailinator, Guerrilla Mail). They are often used to bypass registration requirements.
Syntax checks run locally. MX record lookups require a DNS query, but the email address itself is not sent to any third-party service.