Know if a mail exists or not in Node.js

I'm doing an API that receives a JSON with various information of people, inside those an email, I need to validate if the email has the correct format, if the domain is correct and if the correct one actually exists in that domain.

This is the code that I currently have and it tells me if the domain exists and if it is well written but I need to know if that email exists too!

HELP !!

const dns = require('dns');
function Validar_email(email){
  let domain = email.split('@')[1];  
      dns.resolve(domain, 'MX', function(err, addresses) {    
       if (err) {
          console.log("Error")
          console.log(err)    
      } else if (addresses && addresses.length > 0) {      
         console.log("Correcto")
      }
        })
      }