Upgraded from GW 703 to GW801 and now some of our Groupwise users started to receive confirmation mails about successful mail delivery. Users are still using GW 703 clients. How can I disable this feature? Here is the exact answer from destination email system: "Your message was successfully delivered to the destination(s) listed below. If the message was delivered to mailbox you will receive no further notifications. Otherwise you may still receive notifications of mail delivery errors from other systems."