https://topsitenet.com/article/85934-techniques-used-to-verificar-email/

Most people do not have the time or the patience to learn more about the technical details of any service they want to solicit, but you should not do the same. If you are looking for a way to verificar email, you have to learn as much as you can about it. You do not want to cross any legal lines if you verificar correo just to know they are delivered.