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Email address list checking that’s safe and easy

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Tap into the power of our services with quick, self-serve list checking.

Use CORE to add value to your data. When you know the good and bad email addresses on your list you will save time, improve marketing results and reduce bounced emails.

Click here for a free trial


Who is it for?

Anyone needing to check and clean lists of up to 500,000* email addresses. You don’t need to be a technical whizz. If you can cut and paste or upload a .csv file you can use CORE. And if you need any help, use our 24/7 support.

What does it do?

CORE identifies email addresses in your data, checks them, keeps your data in the right order and gives clear results. It gives you all the information you need to make the most of your emails.

How do I use it?

Upload a .csv file containing email addresses to your dashboard. CORE counts the unique emails, then you choose how to pay and you’re done. You get an email when your results are ready. It’s easy.

*More than 500,000 email addresses on your list? That’s no problem, just contact us to arrange a safe and secure encrypted transfer.

The easiest thing you'll tick off your to-do list today

Upload your data to CORE and get on with the rest of your day. Bye bye bounces - hello clean email data.


At-a-glance results

Manage and understand your data easily. We keep your list in the same order and add columns with top-line and detailed results. Perfect for a quick overview or a closer look.


Syntax errors spotted

When is an email not an email? When there's no @. Our syntax check finds basic errors of missing @ symbols before your emails are validated. You're only charged for checking emails that have an '@'.


Stop disposable emails

Pour cold water on 'burner' email addresses - we monitor for new addresses 24/7 and detect more than anyone else!


Find 'Catch all' mail servers

Get a handle on the real value of your data. Learn which mail servers leave their doors wide open and take delivery for any old junk email address. Emails sent to 'Catch alls' have low open rates.


Say 'no' to spam traps

Fly safely through the spam trap jungle, avoiding mail boxes that squawk or trap you on a blacklist and charge a ransom for your domain to be set free.


Self-serve list checking

You're in control. Upload up to 500,000 email addresses at a time whenever you want to and get an email to tell you when they are ready.


Greylist detection

When mail servers give you lemons - make lemonade. We squeeze every bit of juice from your email data as we return to servers that check our credentials and tell us to try again.


Comprehensive dashboard

Download your list all at once or just by result type, view at-a-glance summaries, and get to grips with your data from every angle.

Product Plans

Pay per file

Check lists occasionally

  • Lists up to 500,000 emails
  • No charge for duplicates
  • Pay by credit card or PayPal


Regular use

  • Various levels up to 2.5 million emails
  • Monthly, quarterly or annual subscription discounts
  • Pay by credit card or PayPal

Large lists

Over 500,000 email addresses

  • Managed service
  • Secure large file transfer
  • Pay by credit card, PayPal or bank transfer
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Frequent high volumes of large lists

  • Private dedicated server with automated secure file transfer
  • Agreed contract duration and payment terms
  • Pay by invoice

Standard plan calculator


Please note Email Hippo has a minimum transaction fee of $9.

Free trial sign up

Try our service for free. Register today for 15 free email validations. No credit card details needed to create your account.