how do i configure mailman

[absi81]

i'm a new plesk user i need 2 know how to reconfigure mailman i'm using redhat es i need 2 know also can i force subscribers from my domain to join a mailing list (if they belong to the same domain ex: if the mailing list is [email protected] and my subscriber is [email protected]) without their confirmation and can i reset the email address used in the basic mailman configuration?
kindly if someone can help me to solve this issue
Regards!
Absi81