Naming a file in the adapter module

Hi All,

I have written an adapter module that is used in a receiver mail adapter. In my module I am renaming the attachment name to "abc.cpi". The problem is I am getting the output from the adapter as abc.cpi.xml. I tried changing the content type in the adapter module to text/plain that gave me an output as abc.cpi.txt. How can I get only abc.cpi as the name of the attachment using this module?

Thanks

Abinash