Open the Moonfruit editor
Launch the Moonfruit Editor for your site, and go to where you'd like to add your Mailing List Widget.
Launch the Insert menu, and click on < > HTML Snippet . This creates a blank HTML Snippet, which you can reposition and resize.
In the Setup tab, paste this code. Then click Apply
To edit your Mailing List on MoonFruit:
Visit the live MoonFruit website and select the gear icon in the top right corner of your Mailing List Plugin.