[rt-users] needs clarification on Cc and Bcc

[slamp slamp]

ticket is owned by nobody.
ticket has multiple Cc's.

two e-mail goes out.
one e-mail only has one recipient (the e-mail address of RT itself).
2nd e-mail has the RT e-mail address and ALL Cc's.

How can I prevent the 2nd e-mail from going out? How can I have RT
only show the RT e-mail address in the e-mail but also send the
correspondence to all that is in the Cc's.

We want to prevent a user from hitting Reply All and thus getting
duplicate e-mails.

Thanks for you help.