Insert emails into email body

So as you can see from above.

I double click to edit an email. 

After that I need to insert in the text body the sender and the CC. FOr example here the sender is Daniel.

WHat I need is a way to copy all the emails in 1 click, so I can add them immediately in the body of the email. 

Sometimes if there are like 10 people in CC it takes too long. 

How I do it, is I copy each one of them manually. BUt there is a problem, cuz I also need to edit the text, copying it like that,, will result in <makering manager daniel.companyn.com> 
This means that for each person I need to edit each email address.