mail error on 10.3.4

Hello to you all. I'm trying to configure my new XServeG5 (macosx server 10.3.4) but i have many difficulties to set up it correctly. I want to use it for mail services but i'm not able to let it work... I usually use 4Dwebstar. I set up server and i configure 2 users in local mode with workgroup manager. I'm able to log in from enturage but nothing else, server accept login for user xxxxx but not his mail messages. When i try to send mail to xxxxx@domain.com this is the results: ------------------- This is the Postfix program at host domain.com. I'm sorry to have to inform you that the message returned below could not be delivered to one or more destinations. For further assistance, please send mail to <postmaster> If you do so, please include this problem report. You can delete your own text from the message returned below. The Postfix program <xxxxx@domain.com>: Command died with status 1: "/cyrus/bin/deliver" ------------------- I thank everybody who will help me. paul [/i]