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I want to create a subscribe button for my website, which validates the email in real time for valid or invalid email addresses. how to create it or is there any open source service available for this?

Jason Clark
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I actually run a SaaS that does exactly this at https://clicktoverify.net/. Basically all you need to do is drop in a JS file on your front-end. The service will send a verification email to your user, and then call a Javascript callback of your choice when they click the verification link.

If you sign up and send me an email (it's in the welcome email) I can help you with the integration.

C. Tindall
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