How to get valid email id

Hello i want to know the email id is working or not.

for example if i am writing mihir@gmail.com

then how could i know that this is valid email id it means it is already exist on web or not??

i want to do it without sending email to user开发者_开发百科

Send a confirmation code to validate , when user confirms that means it exist,

You can extract the domain of the e-mail and make a ping to that address. If the web server response "ok", you know that the domain of e-mail address is valid.

Although you really do not really know if the e-mail is correct without confirmation by the user who writes.

Regards!