My guess is non-unique and regardless of MAIL or NOMAIL mode.

/Pete

At 11:10 02/10/2003 Monday, Nelson R. Pardee wrote:
 >I used the "lists sum" command and the report shows the total number of
 >subscribers to all lists on our host. Is this the total number of unique
 >subscribers, or is it simply the sum of the subscribers to all lists, not
 >accounting for addresses subscribed to multiple lists?