I am looking for the same answer. Basically as you see below, the
answer is no. I do not agree with the reasons. The entire globe is
sending letters with and without attachments to the different
addressee, just with the proper distribution list.
I hope, that the e-mail system will be available shortly with
attachments distribution yes/no, and all party (To: Cc: and Bcc

will know who is getting the e-mail and attachments, and who is
getting an e-mail only. At this time, it looks like is double work
for us, with big attachments.