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Real-Time Email Validation API

With email validation, you won’t waste your budget on email addresses that don’t exist. First 100 validations & 10,000 emails are free every month.

Start Validating Now

Validate email to check for typos and error-entries
Integrate validation into your web forms
Programmatically catch user-entry errors in your sign-up flow with our API.

improving sender reputation
Improve your sender reputation
Reduce your bounce rate by removing temporary and disposable emails from your send.

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Validate Your Emails to Increase Delivery Rates

Prevent typos and eliminate hard bounces. Get comprehensive email verification and a three-step
validation check for each email address on your list.

Test Out Our Email Validator



Approved validation

Validation Based on Billions of Sent Emails

RFC states the formal rules for email addresses. However, in the real world ESPs accept addresses that are not RFC-valid, and reject addresses that are.

When we built our validator, we did so based on real-world data + RFC spec to ensure more accurate validation.

Custom Mailbox Provider Grammar

All major mailbox providers have their own custom grammar rules that impact whether an email address is valid in the real world.

We’ve integrated custom grammar checks for Gmail, Hotmail, and Yahoo into our email validator and are always adding more custom grammar checks as we discover these rules.

  • m+mailgun@gmail.com
    Doesn’t meet Gmail’s local parts rules.
  • michael….is….awesome18@gmail.com
    Meets local parts rules because dots are ignored.

Email validation suggestions

“Did you mean gmail.com?”

People make typos all the time. Gmail.com can easily become gmal.com and when it does, you can miss out on connecting with that customer.

That’s why we built in a suggestion service into our email validation service. When we have a suggestion for a common typos, we’ll return it along with invalid status, so you can offer the suggestion to your user.

Avoid High Risk Addresses

Our email validation API is your first line of defense against high-risk recipients. When validating an email address, we check for role-based addresses or disposable email domains.

Email validation suggestions

Other Great Features of Mailgun Validation

  • DNS lookups
  • MX and A-record look ups
  • Parse email address in bulk into local part and domain