I want to Coordinate civiCRM mailing list and SimpleNews Mailing list
There are a couple of workarounds that may help you.

Civimail offers a 'public' page version of the mailing. not the same thing but not sure if you knew that or not. When you set up a Mailing you have the option of setting its visibility to public, and then there are Drupal permissions to determine what roles can access this.

Also there is an extension developed by Fuzion here that lets you put a Views token in a mailing, so you can


create your newsletter stuff in drupal 
create a views display for this content 
put token in civimail