Forward your email and put the recipients on the BCC and nobody will know who were the recipients of the original email
As per my first warning - anyone in the TO or CC list will be replied to if the BCC recipent does a reply to all.
If you send an email and put all recipients in the BCC list then there is no possible reprocussion as the reply to all will only go back to the sender.
My warning was more if you are going to selectively include people on a BCC as they can expose they were copied in by replying.