Email Checker is a simple tool for verifying an email address
Email Checker is a simple tool for verifying an email address. It's free and quite easy to use. Just enter the email address and hit check button. Then it tells you whether the email address is real or not. It extracts the MX records from the email address and connect to mail server (over SMTP and also simulates sending a message) to make sure the mailbox really exist for that user/address.