When someone creates a mail account in DNP, they can create a MAIL ADMINISTRATOR
if the user logs in to SM as the mail administrator, they can create more mailboxs. DNP does not know these mailboxs exist so the user can use much more system resource than DNP Tracks.
Helm4 reads SM live and does not store details in a DB. it would be good if DNP could work this way too, so if the user creates mailbox's in SM then DNP will automatically import/show these mailboxs within DNP.