How to Add fields in Attachment for Proxy to Mail Scenario

Hi Friends,

I have a scenario proxy to mail in which I'm getting.

XML as an attachment after adding some bean.

Now I wanted to get some fields in the output attachment for which I'm not giving any values while triggering.

In my structure I have some fields Subject ,To ,from ,Reply_to,content_Type
I want this also in attachment as tags.

Thanks and Regards,

Kamal S.