title: java: how can i verify an email address to be valid without sending a confirmation e-mail?
body: <p>when people register to my website i don't want to send them a verification e-mail, i just want to check if that e-mail exists. is there a way to do such a thing ? </p>
  
  <p>using apache-tomcat and java as my main programming language.</p>
  
  <p>thanks a lot!</p>