Platform: Perfect Ubuntu 7.10 Server w/ISPCONFIG I am able to send mail from a pop client to another domain without problem. When I attempt to reply to the email, I receive the following error: "You do not have permission to send to this recipient. For assistance, contact your system administrator. <corp2.xxxx.com #5.7.1 smtp;554 5.7.1 <[email protected]>: Recipient address rejected: Access denied>" Any help would be GREATLY appreciated. Todd