This email verification tool actually connects to the mail server and checks whether the mailbox exists or not, wipeout disposable email addresses from your email list.
ActiveConversion - The leading industrial sales & marketing system
Bulk Email Checker - Bulk Email Checker is an online service used to Verify and Clean Email Addresses. Its Easy to Use, Reliable and used by 1000's of Businesses.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Email Checker - Email Checker offers a real-time API and bulk validation for list cleaning.
INinbox - Get Your Marketing Emails IN the Inbox
Email Hippo - Email Hippo provides online email validation service for professional marketers and their clients.