ListNanny.NET is a web based email application through which users can parse bounced mails and based on the nature of the bounce mails, they can take suitable actions for non existing mail IDs's, Inbox overfow etc thus cleaning up the mail lists and improving the overall efficiency of mailing lists. This program helps the users to delete the fake and unwanted email addresses. It offers various features like avoiding the occurance of NDR, helps in finding the addresses of the bounced messages, original bounced to address, loading NDRs from a file, system.IO.stream, from a stream, helps in generating XML reports and more.