If you see a website promising “instant PayPal email verification without sending money” — run. At best, it’s outdated code. At worst, it’s a phishing site designed to collect emails or your own PayPal credentials.
If you’re selling something, send an official PayPal invoice to the buyer’s email. PayPal will not allow the invoice to be sent to an unregistered email without warning you. paypal valid email checker
(for cleaning large existing lists) Which of these would be most helpful for your project? If you see a website promising “instant PayPal