Free email verifier
Test the validity and deliverability of an email address in seconds. Reduce your bounce rate before you send.
Free verification, one address at a time. To validate a whole list, use Listar.
How it works
The verifier checks the syntax, the domain (MX record) and the existence of the mailbox to estimate the deliverability of the address.
Enter the address
Type the professional email you want to verify.
Run the check
Listar checks syntax, domain and mailbox in real time.
Read the verdict
Valid, invalid, disposable or inconclusive — act accordingly before sending.
Frequently asked questions
Is the email verifier free?
Yes. Verifying one address at a time is free, within an anti-abuse quota. No signup required.
What does an inconclusive result mean?
The receiving server accepts all addresses (catch-all) or blocks verification. Only a multi-level validation like Listar's can decide.
Can I verify a whole list?
The free tool handles one address at a time. To validate thousands of addresses with the full waterfall, use Listar.
Why verify your emails?
Sending to invalid addresses increases your bounce rate and damages your sender reputation, which hurts the deliverability of all your campaigns.