qmailadmin abd ezmlm

[QMAIL]

I need help. I have installed the ezmlm and qmailadmin. I can create lista with the qmailadmin, but everybudy can send mails to this lists. How can I do to restrinc, to only suscriptors send messages to the list ?     Sorry by my english, but is not my languaje (I am from Argentina)   ----------------------------------------------         .--.        |o_o |                  |:_/ |       //   \ \      (|     | )     /'\_   _/`\     \___)=(___/