Hi Dennis,
I appreciate your reply! Thank you! But I really need the Information about the coding side of the process 
The possibilities in the drag & drop editor are so far clear and if there are really restrictions with coding from drag & drop email templates, then maybe I will have to make some compromises. But I hope, that there is a possibility to code the email templates completely and not to compromise on that, so I have the whole flexibility of free coding 
Thanks,
Mainata