I am writing application in C#.Net 2.0 to read mails in Lotus Notes database and upload into another application. Emails can come to this mailbox from many sources. There are also other applications that send mails with FROM address as this mailbox while sending to other usersgroups and in this process, this mailbox gets DELIVERY FAILURE REPORT mails for users not listed in Domino Directory. The application that I am writing reads these mails but I want to be able to edit the subject to prefix "Process Error". Is it possible to alter the Delivery Failure Report programatically?