YL Mail Verifier is a powerful and easy-to-use solution for the "email message delivery error". with this Mail Verifier, you can easily check every email address from a mailing list and determine if the email addresses are still valid. it does three levels of verification: Syntax, DNS and SMTP. it is the fastest e-mail verifier in the market today. YL Mail Verifier is designed for system administrators, webmasters, programmers as well as for...