Your account includes popular mailing list software known as "Mailman". You can add a mailing list to your hosting account by simply logging into your cPanel, under the "Mail" group of icons select the "Mailing Lists" option.
Once inside your Mailing Lists menu, choose "Add List" from the options menu and enter in the pertinent information for "List Name&", "password", "domain" and click the "create" button.
To manage your mailing list, choose the "edit" button from the Mailing List menu, at which time you'll be prompted to enter your password to gain access to the administrative section. Once logged in you will able to adjust a wide variety of settings associated with your mailing list.
Warning: Deleting a mailing list will delete all files associated with that list including current mail, archives and member email addresses.