Email validation API that integrates with ease

See better results from your email list. Embed our email validation API into your site, form, or application to automatically verify all incoming addresses before you hit send.
Single email validation API
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Build email validation directly into web forms with Mailgun’s API

Mailgun’s powerful email validation API helps you maintain good list hygiene so you can focus on what matters: the messages you’re sending.

  • Real-time integration with our API
  • Email server verification and results return delivered in under 200 ms
  • Grammar, spelling, and email provider verification
  • Open-source library to modify the email validator for your own use case
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UNMATCHED ACCURACY

Reach more inboxes with our email validation API

Unlike standalone validation tools, our API cross-references your email list against our database of over 450 billion emails to flag undeliverable and high-risk addresses before you hit send.

  • Send more. Pull bad email addresses from your list in real time and improve sender reputation while lowering bounce rates by up to 21%
  • Send smarter. Use our proprietary engagement data for more personalized targeting and increase open rates by up to 65%
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THE INDUSTRY’S FASTEST EMAIL VALIDATION API TOOL

Maximize email efficiency and drive revenue

One bad email address can damage your email program – multiply that by tens, hundreds, or thousands and you will see a drop in inbox placement, engagement, and overall email ROI (maybe even land on a blocklist).

Integrate the industry’s fastest email validation API directly into your platform to systematically remove invalid and high-risk email addresses in real time, leveraging Mailgun’s technology to instantly identify disposable addresses.

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PROTECT YOUR EMAIL SENDER REPUTATION

Remove disposable email addresses and minimize risk

Bad actors are working tirelessly to find new ways to manipulate your systems and create new (illegal) opportunities for themselves. And now that disposable email addresses are widely available, it makes organic email list building that much harder for legitimate senders.

Our email validation API is able to identify most types of disposable addresses, so you have one less thing to worry about when building your email lists the right way.

An easy API for email address validation

Curate a list of real people interested in your content, products, or services so that every lead is a lead you can use.

Mailbox/MX verification

Scrub bad email addresses across providers like Gmail, Hotmail, Yahoo, and more.

Disposable addresses

Flag disposable email addresses and spammers using long number/letter strings.

RFC grammar rule check

Weed out common form typos and misspellings like “@outlooks” instead of “@Outlook.”

Disposable address verification

Filter out incorrect or misspelled email addresses with grammar and syntax checks.

New or risky domain analysis

Confirm domains with MX DNS, and A record lookups plus SMTP analysis and parsing.

Role-based address verification

Send to people and not shared @help or @support addresses.
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A MORE RELIABLE EMAIL VALIDATION API

Create a competitive edge

Every email address processed is checked against a database of cached data that comes from the over 450 billion emails we deliver every year as a leading email service provider. Plus, we also check against data that comes directly from the mailbox providers themselves for an unmatched level of performance.

It’s easy to get started. And it’s free.

See what you can accomplish with the world’s best email delivery platform