How to omit sending attachments to CC address?

Hi there,

is there a way, perhaps in x-settings, to set Eudora to only send 
attachments to the address in the To field, but omitting them from other 
recipients listed in CC?

I often need to dispatch large print files to a service bureau, cc-ing 
the client, so they know it's gone. However I would like to avoid 
sending the files to the client as well.

-- 
Cheers  Martin