Click ‘Create a mailinglist’. In the ‘List name’ field, give your list a name or e-mail address indicating the purpose of the mailinglist. In the ‘Domain’ field, select the domain.
Next, enter a password in the ‘Password’ field . Repeat the password in the ‘Confirm password’ field. Finally, enter the e-mail address of the administrator responsible for the list. 
After you’ve entered all the details, click ‘Save’ to return to the overview. The list now shows the mailinglist you have just created. 
Note that the e-mail address that you have assigned to the mailinglist can not be used as an account, redirect address or an account with redirects under ‘E-mail’. This e-mail is reserved for the mailinglist.