E-mail Address Checker is your powerful solution for the standard 'message delivery error'. When some Internet users move from one service provider to another, they do not take their e-mail addresses along with them. Users who lost their e-mail accounts may not notify you of their loss. Internet users may choose to subscribe to your service with a phony e-mail address so that they have access to a free download that you may be offering online. Hence, you are left with dead e-mail addresses. Our E-mail Address Checker verifies every e-mail address from a given mailing list and allows you to determine up to 90 percent of dead e-mail addresses.