Mailman - unmoderated lists ? How?

Go to the "Membership Management" section in the list administration.

As you list members, you will see a "mod" column. That means that individual is "moderated" if checked. You can make one user "unmoderated" at a time, or if you want to make the entire list unmoderated, go to the bottom of that page and there is a tool to set everyone's mod setting to on/off.

Hope that helps.