Hello Friends, I have fresh installed Ubuntu 11.04 Server and ISP Config. Most thing is working as it should. Currently Mail problem is with email. I am not able to recieve email on [email protected] from gmail (outer World) but can recieve from [email protected]. Situation is very smiler to http://www.linuxquestions.org/questions/linux-server-73/cant-receive-mail-ispconfig-3-a-836274/ But there was port forwarding problem and with me is DNS problem. how ever nslookup colorpecker.com easily returns 18.104.22.168(static IP). and colorpecker.com web is working properly. Here is below error from bounce mail. This is an automatically generated Delivery Status Notification THIS IS A WARNING MESSAGE ONLY. YOU DO NOT NEED TO RESEND YOUR MESSAGE. Delivery to the following recipient has been delayed: [email protected] Message will be retried for 2 more day(s) Technical details of temporary failure: DNS Error: Could not contact DNS servers ----- Original message ----- MIME-Version: 1.0 Received: by 10.68.59.98 with SMTP id y2mr2126256pbq.160.1310090345133; Thu, 07 Jul 2011 18:59:05 -0700 (PDT) Received: by 10.68.63.40 with HTTP; Thu, 7 Jul 2011 18:59:05 -0700 (PDT) In-Reply-To: <[email protected]> References: <[email protected]> Date: Fri, 8 Jul 2011 09:59:05 +0800 Message-ID: <[email protected]om> Subject: Re: You can mail me schematics on this Id From: Piyush Verma <[email protected]> To: [email protected] Content-Type: multipart/alternative; boundary=bcaec5304f81a5360a04a7852d70 Any Suggestion Highly Appreciated.