Email Verifier

We have verified over 90 million emails in the last year.
We can clean your email list too.

Try Email Checker for free

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Email address could not be verified as it has been claimed and deleted from our database by the owner

This email is valid! Sign up to get additional data about the prospect, including their name, company, and job position.
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Sign up and verify 50 emails for free
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No luck with email guessing? Sign up to find pre-verified prospects for your business.

Good outreach is only possible if you reach the lead’s inbox.

Check email addresses and reduce your bounce rate. Our email tester won't let a single bad email slip through.

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  • Check individual email addresses

    Verify email addresses in seconds through the app or with our handy email address checker extension.

  • Verify email addresses in bulk

    Our bulk email verifier tool will help you improve email campaign sending results with a complete email list verification.

  • Enrich your database with accurate leads via API’s email address verifier API can build directly into your platform for integrated email validation at registration or lead form sign-up.

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Frequently asked questions

What is the purpose of an Email Verifier?

Email address verifier, or email checker, is a tool that can clean your email list from old and invalid emails. Sending to unverified email lists will lead to a high bounce rate and blocking of your email by ESPs. The goal of our service is to maintain the high reputation of your email account by improving the delivery rate of your campaigns.

How much does 1 verification cost?

Verification of 1 email address costs 1 credit.

How do you clean email addresses?

We check emails using our unique 7-tier email verification process that includes MX record check, super-accurate SMTP ping, and even greylisting bypassing for extra tough cases.

Can you verify any email?

We will verify most email addresses, including custom domain emails. We do not verify emails from catch-all domains.

How accurate are the email verification results?

There is no way to verify an email with 100% accuracy without sending an actual email to it. That said, according to our latest tests, the bounce rate for emails that have received a “valid” status after email verification with is only 1.72%. With our email checker, you can maintain an average deliverability of 98%. So if you’re wondering “Is this email valid?”, sign up and verify it with!

Can I verify email addresses in bulk?

Yes, you can! Our bulk email verifier is available in the app or as an API. Bulk email address verification can be performed right in the email verifier tool: simply upload your list or find emails with our Email Finder tool and start email list verification.

Is the Email Verifier free? Email Verifier is free to use on a free account. Free accounts receive 50 credits/month for free. You can use the free plan for as long as you need, no credit card required upfront.

How to check if an email address is valid?

There are two ways to check the validity of an email address:

  1. Manual check. Simply send an email to the addressee. While this method delivers reliable results, it will take hours to verify long emails lists. And in case of large sending volumes and high bounce rates, you sender reputation is exposed to a high damage risk.
  2. Automated check. Use an Email Verifier tool to test email validity against all main criteria, like MX record check or the super-accurate SMTP ping. Just upload a list of email addresses or check one-by-one to verify them and keep your sender reputation healthy. is the most complete platform for cold email and prospecting strategy! It speeds up the process and turns possible future revenue into actual present.

Konstantin Dubovitskiy author

Konstantin Dubovitskiy, Growth Manager of Content at Firstbase

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