Free Email Verifier - verify email id before sending mail

This online email verification tool actually connects to the mail server and checks whether the mailbox exists or not.
What is being verified:
Format: "name@domain.xxx"
Valid domain: "somebody@new.york" is not valid
Valid user: verify if the user and mailbox really exist

All you have to do visit this website 

http://verify-email.org/

put email id you want to send email & check the validity of email address.

here are the results.

santoshdudhade@hotmail.com - Result: Ok

MX record about hotmail.com exists.
Connection succeeded to mx4.hotmail.com SMTP.
220 SNT0-MC2-F25.Snt0.hotmail.com Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at http://privacy.microsoft.com/en-us/anti-spam.mspx. Sun, 13 Jan 2013 02:52:13 -0800 

250 SNT0-MC2-F25.Snt0.hotmail.com (3.17.0.77) Hello [217.26.147.28]

> RCPT TO: <santoshdudhade@hotmail.com>
=250 santoshdudhade@hotmail.com 

Source-

http://verify-email.org/