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HuBuCo is the most accurate validator on the market

Our test results are showing less than 1% hard bounces when sending emails to email addresses validated using our system.
Money Back Guarantee: If you send a newsletter to the email addresses you had validated by HuBuCo within 7 days of validation and your hard bounce rate is higher than 4% we refund your money. HuBuCo's Terms of Use apply.