I have a server running ISPConfig Version: 2.2.1 that i installed with a .org domain and tried to point a .com domain there as well. To make a long story short, when I deleted the .com domain all the mail is still attempting to stay on the box. So when you email [email protected] forwarded to an offiste server it works. But when you email [email protected] forwarded to the now off server domain it returns undelivered with: (changed domain and sender only) This is the Postfix program at host www.blah.org. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. 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 attached returned message. The Postfix program <[email protected]> (expanded from <[email protected]>): mail forwarding loop for [email protected] Reporting-MTA: dns; www.blah.org X-Postfix-Queue-ID: 27C5756003F X-Postfix-Sender: rfc822; [email protected] Arrival-Date: Thu, 18 Oct 2007 15:48:48 -0500 (CDT) Final-Recipient: rfc822; [email protected] Original-Recipient: rfc822; [email protected] Action: failed Status: 5.0.0 Diagnostic-Code: X-Postfix; mail forwarding loop for [email protected] From: im me <[email protected]> Date: October 18, 2007 3:47:58 PM CDT To: [email protected] Subject: test email test I have tried to delete any references to the old .com domain but cannot find it anymore in the system. I then went into phpmyadmin and found it in a couple of places and deleted the row. I have restarted the SMTP and DNS services many times and still have the issue. Again, when you forward the address to any other domain to forwards the mail correctly, only when I have it forwarded to the domain that is now off the box that I tried to remove you get the loop message. Any help would be greatly appreciated.