Email checker online
Validate a single email address
Check syntax, MX records, and SMTP availability in one click. No data is stored; results are returned instantly.
What we check
- • RFC syntax validation
- • MX records availability
- • SMTP handshake (non intrusive)
- • Disposable domain filter
Email checker online tips
- • Keep requests under 5 per minute
- • Use bulk tool for CSV lists
- • Use API for signup forms
FAQ
Is the email checker online free?
Yes, single checks are free. Bulk validation is also free up to sensible limits.
Do you send emails during validation?
No, we perform SMTP handshakes only. No test messages are sent.
How fast are results?
Most checks finish in under two seconds depending on the target mail server.