Thanks falko and till for your unwavering devotion to help out people in their problems especially the Linux people here's my problem: I setup Dapper following ur perfect Setup instructions and ISPConfig. everything went fine setting it up from DNS to hosts. I set up emails for my domain www.gcic.edu.ph here's an example: user : gcic9_webmaster email : webmaster when I use Webmiau, i can send email; but when I use webmails like Yahoo! or Gmail to [email protected], my mail bounced back getting this error message: This is an automatically generated Delivery Status Notification Delivery to the following recipient failed permanently: [email protected] Technical details of permanent failure: PERM_FAILURE: SMTP Error (state 9): 554 <[email protected] ----- Original message ----- Received: by 10.70.32.6 with SMTP id f6mr1757186wxf; Thu, 03 Aug 2006 20:53:17 -0700 (PDT) Return-Path: <[email protected] Received: from itoffice ( [220.127.116.11]) by mx.gmail.com with ESMTP id h37sm386101wxd.2006.08.03.20.53.13; Thu, 03 Aug 2006 20:53:17 -0700 (PDT) From: "Roland Fontilla" <[email protected] To: <[email protected] Subject: TEST August 4 Date: Fri, 4 Aug 2006 11:53:04 +0800 Message-ID: <[email protected] MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01C6B7BC.9162E530" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Aca3eXyBCJx985J4QX6q9XxK8+UaDw== Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0016_01C6B7BC.9162E530 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit TEST August 4, 2006 ----- Message truncated ----- where did i go wrong? I need to fix this to deploy it ASAP. Thanks for the response and more power!