I figured out the way to add the recipient and sender manually. the default recipient option need to be unchecked and then we need to provide the sender mail id and receiver mail id and we need to add the file with extension. For eg. Sender: xyz@stackoverflow.com Recipient: zyx@stackoverflow.com sub: anwer file: answer.xls
we need to add the extension along with the file name to receive the file as excel or else it will receive as desktop intelligence file.