No recipients found for deferred delivery on transaction

I’m having trouble tracking down why I keep getting this message in my debug log:
No recipients found for deferred delivery on transaction

This happens (I think) on every transaction that is recorded. I’m more concerned with the ticket created transaction. When I create a ticket I do get a message - so why is this line recorded in the log file?

Kevin W. Gagel
Network Administrator
Local 5448
My blog:
http://mail.cnc.bc.ca/blogs/gagel
My shared files:
http://mail.cnc.bc.ca/users/gagel