It concerns Exchange 5.5 I know Exchange 5.5. sends an NDR if a message is sent to an invalid recipient but can the actual message be send to a postmaster mailbox? On the IMC you can configure a mailbox but no messages are currently going to that mailbox. What I would like is a message coming from the internet, sent to an invalid recipient in my domain, gets dropped into a mailbox in my domain. This only concerns incoming messages, coming from the internet that is. Victor