Sc_mail - hide recipient emails

I have a mass email system where I want to hide the recipient email addresses but copy others within the organisation.

BCC works but then I need to add the people who should be copied as To recipients. This gets confusing in the email header.

I would prefer to simply use the “To” field (but hide the recipient emails) for the main recipients and “CCC” for the people in the organisation.

The sc_mail macro does not seem to allow this.