Real-Time Email Validation API

Get better results from your email campaigns and protect your platform from bots

Your first 100 validations are free every month

  • Integrate validations into your web forms
    Add our API to your sign-up flow to programmatically catch misspellings and user-entry errors
  • Clean all your email addresses at once
    Reduce your bounce rate by removing temporary and disposable emails from your send

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Trusted by Smart Software Development Teams

Customized Delivery Plan

Maximize deliverability with comprehensive verification

Mailgun performs a three-step validation check for each address we verify, including a check against the mailbox provider to determine if the address is valid.

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 based on real-world data + RFC spec to ensure more accurate validation.

Email Validation
Email Performance

Custom ESP grammar

All major ESPs have their own set up custom grammar 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.


“Did you mean” and other suggestions

  • Deliverability and recipient engagement management
  • IP allocation management
  • Managed IP warmup
  • Reputation monitoring & consulting
  • Sending infrastructure consulting
  • Email tracking and testing consulting
  • Custom reverse DNS on all your IPs
  • Dedicated IP subnets with bursting to high quality shared IPs

Integrate email into your app
in minutes with our API

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Learn more about our managed email service.