title: Verify input email address is exist or not in React.js or Node.js
body: <p>Is there any package or any other way to verify the entered email address is exist or not. SendGrid will send whatever email address you are passing but it is not telling the input email address is exists or not.</p>
  <p>Please let me know if there is an way to verify it in React.js or Node.js.</p>
  <p>Thanks in advance.</p>