I have an asp application that sends an email (using CDonts)to the user after obtaining some information from them. Sometimes the user will input their email address incorrectly, then i receive a message that the mail was undelivered. The problem is it is sometimes 48 hours or more before i receive the undeliverable message. i would like to receive these messages promptly so that i may try to contact the person regarding the invalid address. Is there a way to set a time limit on this?