Select the Target Audience Groups
Each message automatically inherits the audience configured for the campaign. However, you can add or remove groups of constituents for each individual message.
If there are members in a group who should not be sent the message (for example, they have already performed the interaction associated with the message), you can exclude them from the mailing without disturbing their membership.
Add a group of recipients to the Target Audience Groups
Select Email > Email Campaigns.
Select the Campaigns tab.
In the Actions column for the appropriate campaign, select Manage.
Select Send a Message in the Related Actions column.
In the Actions column for the appropriate email, select Set Up Delivery.
Select Select Target Audience Groups in the Related Actions column.
Select the appropriate group type. and select Save.
Note: To remove a group, place your cursor over the group in the Selected area and select the X in the upper right corner.