i have created one application which will send and receive mails, so in that application when i send any mail then it should go to "user created" folder instead of "sent" folder of exchange server2003.
I mean it should directly navigate to "user created" folder from the "outbox", it should not go to "sent" folder from "outbox".
You need to add the header "Savedestination" to the message.
See http://msdn.microsoft.com/en-us/library/ee178357(v=EXCHG.80).aspx