I have begun moving mailboxes from E2K3 to E2K7SP1. So some of my DL's have users on E2K3, and users on E2K7SP1. In the case where a unix script is hardcoded to send an email to an SMTP address which belongs to a distribution group, pointing to the IP address of thhe E2K3 mail server, only the members of the list that have mailboxes on the E2K3 server receive an email. If I send an email to the list fromm Outlook, all the users on the list get the email. Any ideas would be greatly appreciated.