We recently had to change our server box and reinstall Server 2000 SBS. The Exchange settings were moved to the new installation, which were almost all default settings. Since the new box went live, email messages are being duplicated based on the number of recipients from the domain. For example; for an email with 10 recipients, 8 are from our domain. For each of those 8 instances, the email is essentially "bouncing" off our server and being sent to every recipient again. For the 2 recipients that are not from our domain, they will receive that email 8 times - one for each of the recipients from our domain.