Marc, @marc-bovet
I have a couple of gists showing how to send a copy of emails to admin also.. is this what you need? Or will this help give you an idea of how you can achieve what you need to do?
https://gist.github.com/fervous/c1cb74fb1a44329a2802d7d16c5ba940
.
https://gist.github.com/fervous/e79e9d9e41d5a0c9de092d24e5f2c3e8
