When creating a Web submitted content mailing it is possible to assign as many Lists or Segments to the mailing as you wish.
Do the following:
- Select Mailing
- Select New Mailing
- Create mailing content as usual
- Click Recipients tab
- Click Segment - Choose Segment button
- Click on the name of List / Segment
- Click button between 2 Windows to move List / Segment to Chosen Window
- Click Save
After saving, a copy of the mailing will be created in the selected lists for which the segments were created.