Jayakar:
Adobe Reader users can only submit XDP, FDF, XFDF, XML formats unless the form has Usage Rights Enabled in Reader.
However, if you can only submit XDP, FDF, XFDF, or XML, you can merge the PDF submit response with a blank PDF form on a server by submitting to a server side script, and attach the merged document to an e-mail message and send via SMTP server without Client-Side email software such as Outlook.
For more information:
http://www.pdfemail.net/