By default, the Configuration tab of the Groups Web Interface contains several lists that can be used to determine how the policy deals with specified email addresses and/or domains. These lists are Allowed Relays, Allowed Senders, Blocked Relays and Blocked Senders. You can also create custom lists to augment or replace the existing lists using the pmx-group-list command.
Regardless of whether the list is a default list or a custom list, it must be combined with a rule in the PureMessage policy in order to have any effect. For more information, see "Creating a Custom Group Policy List and Rule" in the Groups Setup tutorial.
To create a group list: