How to check whether email address exists or not without sending mail (Simplest method)

Hi Friends, I dug many times on Internet to find this trick. In this article, I'll tell you how to know whether an email-ID exists or not without sending actual mail to that ID. We can accompanish this task by various methods like telnet in command prompt, or perl / php scripts, but these methods can be used effectively by the programmers or technical persons only. This