Email Verification Service

Reach the most customers with the fastest email address verification service

With InboxReady Email Verification, you won’t waste your time or budget on email addresses that don’t exist.

A graphic illustration showing how a single email verification catches invalid email addresses.

Protect Your Business

A bad email address is a lost customer

Over 20% of your email database will go bad this year. Invalid email addresses result in unnecessary bounces, drive down your engagement metrics, damage your sender reputation, and cost you money.

How much time and money are you wasting on bad leads?

Mailgun’s entire business is sending email. We send more than 250 billion emails every year, so we’ve hashed the majority of active email addresses. We know what’s deliverable and what’s not.

Plus, our quick Email Verification software is part of an integrated suite of deliverability features and services. You don’t have to worry about wasting time and effort switching between different platforms and data sources.

Instant Email Verification

The InboxReady advantage

Better. Faster. Safer. Find out what you can do with our Email Verification features.

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Cut down on bouncebacks

Customers who verify email addresses with us before they send have a 21% lower bounce rate, dramatically improving their delivery rates.

Save time for yourself and your customers

InboxReady provides the fastest Email Verification service in the industry. We minimize latency to ensure that your signup, checkout, or form submission page never slows down.

When verifying large contact lists, you can get your results in minutes instead of hours or days. Need to clean a list with millions of addresses? Walk to the break room, grab a cup of coffee, and come back to a clean email list.

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Protect your platform from abuse without sacrificing performance

Bot attacks can turn into full-blown DDoS attacks if detected too late. Users trying to trick your platform with grammar rules? Our email checker flags that information, too.

Versatile Features and Smooth Integration

Verify both current and new addresses

Check email validity at signup to make sure you’re capturing good data. Clean your list periodically to make sure it stays that way.

Real-time Email Verification API

Verify email addresses at the point of capture to reduce invalid signups with our real-time Email Verification integration.

A graphic illustration showing Mailgun's email verification API.
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List verification feature

Clean your subscriber list of invalid emails before you send. Our list verification feature is as simple as uploading a .csv.

Not sure whether your list needs a clean? Run a list preview for free. This test version of our Email Verification feature assesses a statistically significant sample of your list so that you can decide whether you need to clean the rest.

Best-in-Class Email Verification

Industry-leading, proprietary features for optimal results

All of our deliverability features are built in-house, from the ground up, backed by our years of expertise sending email. Verify your entire email list at once and reduce email bounce rates. Easily identify valid email addresses, role-based addresses, typos, and more. InboxReady Email Verification features go beyond simple grammar rules — we check email addresses directly with the mailbox to confirm that every address on your list is real. That’s accuracy you can rely on.

InboxReady offers:

  • Lightning-fast Email Verification

  • Mailbox/MX verification

  • Role-based address verification

  • Disposable address verification

  • Catch-all address verification

  • Suggestions for suspected typos

  • RFC grammar rule check

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

It's easy to get started. Talk to an expert to learn more about how Email Verification can improve your ROI.