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.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
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.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Email Checker - Email Checker offers a real-time API and bulk validation for list cleaning.
BriteVerify - Email Validation & Email Verification reduces bounce rates up to 98%. Rapidly verifying email addresses has never been easier, just drag drop and deliver!
Verifalia - Verifalia is a web-based email validation that lets users to upload and validate lists of email addresses.