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Email validation Service

Email checker – The easiest way to verify email addresses

Check if an email address is valid or not with Mailgun's fast and simple email verification tool. We send billions of emails every month and use this data to build the fastest and most accurate set of email verification data available.

Why you should verify your email list before sending bulk email

Bad email addresses = bad news.

That’s because bad email addresses usually result in a hard bounce.

That email you’ve spent hours crafting and optimizing? It never reached your customers and shows inbox providers that you’re not following best practices. This bounce, in turn, hurts your sender’s reputation and you’ll start to see negative impact on your overall email deliverability as a result.

You spend thousands of dollars and hours of work acquiring email addresses. But a bad email address? That’s not just a lost customer – it’s all that time and energy wasted. Don't let typos clog up your email list with invalid email addresses. Use email checking tools to ensure you're capturing every customer along the way.

Mailgun’s email validation tool can lower your bounce rate for your email campaigns by up to 20%. Supercharge your email marketing campaigns with Mailgun's powerful email verification tool.

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

How often should you check your email list?

Well, pretty often.

That’s because when you collect a person’s email address, you’re only collecting one snapshot in time. They may change email addresses, switch domain names, leave their inbox service provider, and more. In other words, about 25% of your email database goes bad every year. We recommend running a full email verification on your email list annually.

If you need help with your overall email deliverability strategy – Mailgun can help. We’re an industry-leading email service provider (ESP) that has partnered with leading companies like Lyft, Shopify, and Etsy to help improve their email performance. See what we can do for your small business!

Why choose Mailgun?

Mailgun processes billions of emails every month. This gives us a powerful dataset that other providers just don't have. If your email verification provider doesn't actually send an email, how do they really know if an address is valid or not? Mailgun has cached nearly every available email address today, and we'll continue to grow our accuracy as our customer base grows.

Don't get locked into a provider with a bad data set. Trust Mailgun to help verify your email lists, send bulk emails, and monitor your domain reputation.

Never get a hard bounce again with the fastest bulk email verification tool in the industry

Don’t wait to receive that hard bounce to find out you’ve got a bad email address on your hands.

Our email verification tool uses our cache of billions of email addresses as its primary source so you can get lightning-fast verification. It's so fast that you can call our service on your signup, checkout, or form submission page to ensure you're capturing accurate results before users even enter your system.

Need a bulk email verifier for millions of emails? You can expect results from us in minutes, not days. Our powerful algorithm identifies typos, misspellings, and other errors that put your sending reputation at risk — so you can breathe easier when you press send.

Trust Mailgun to help verify your email lists, send bulk emails, and monitor your domain reputation.

A graphic illustration of email verification.
A line art graphic illustration showing email verification.

How does email address verification work?

Using Mailgun's Email validations service, check a single email address at a time, upload a CSV of emails to validate in bulk, or use our super-fast email validation API. Our email checker goes beyond real-time analysis and looks at deliverability history across the Mailgun ecosystem. Our verification service catches syntax errors or suspicious domain names in seconds.

We combine the power of our sending data from analyzing billions of emails every day with SMTP lookups from email providers like Gmail, AOL, and Yahoo Mail to determine if an address is mailable or not. Our proprietary verification process does the following checks:

  • Email server and MX record verification

  • Roll-based address verification

  • Disposable email address verification

  • RFC grammar rule check

  • Suggestions on suspected typos

We’re constantly adding new rules and updates to ensure that you’re always checking email addresses against the most up-to-date information. Get email verification and more with our Foundation plan.

Sign up and start checking your emails today.


What’s a valid email address?

A valid email address belongs to a real person, contains allowed characters, and is free from mistakes like typos. Invalid email addresses could include misspellings, wrong domains, or be bot addresses. Check your email addresses today to minimize email bounces.

Can you perform real-time email verification?

Yes, our email validations API performs email verifications in real-time.

Can I check a whole list of email addresses at the same time?

Yes, you can perform bulk email verifications with our email validations API. Alternatively, you can use the Mailing List feature on our platform to verify emails in your mailing list.

Can email verification remove duplicates?

Yes, our email verification tools help you identify and remove duplicate emails.

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

It's easy to get started. Create a free account and test out our free email verification and sending tools for 30 days.
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