Where I can find the official phpList Forums?
You can easily get to the official phpList forums website via the Administration Page of phpList.
Use the navigation menu on the right -> click on Help.
On this page you will see links to the support and developers sections on the phpList website, where you will find plenty of information about how to use and configure your application.
Alternatively you can click on the following link to get directly to the phpList.org official forums website:
There you can get help and discus on any topic about your application.