Does Marketo have a cc function?

don't think so... what do you mean by "look as if the email has been cc'ed" ?

Thanks for your response! We want to send an email that has a cc field that can be populated.
This way when a new lead recieve the email and responds, they are responding to the person who was cc'ed.

It's a referral program so it's imporatnt to have that functionality so that it can create the lead and trigger the rest of the email series.

Just curious, why not just change the reply-to email to the email that you want people to respond to?