Double headers

["Kimberly Long" <siberia @ usis . com>]

I have several subscribers that are using mail programs that strip 
the headers on mail received from my list.  Is there a command (such 
as that in listserv) that can set their subscription to dual headers?
TIA

Namaste'

Kimberly Long
siberia@usis.com

If a man does not keep pace with his companions, perhaps it
is because he hears a different drummer.  Let him step to 
the music he hears, however measured or far away. 
)O(                                               ~~Thoreau