what is the bouncing email?!!!!

I know that not related to php-db stuff but I need some guru help :) I have got the following msg saying my emails bounces what does that mean and how could I handel it any help will be appreciated cuz I don't wanna to be removed from the mailing list end <---- start Hi! This is the ezmlm program. I'm managing the php-db@lists.php.net mailing list. I'm working for my owner, who can be reached at php-db-owner@lists.php.net. Messages to you from the php-db mailing list seem to have been bouncing. I've attached a copy of the first bounce message I received. If this message bounces too, I will send you a probe. If the probe bounces, I will remove your address from the php-db mailing list, without further notice. I've kept a list of which messages from the php-db mailing list have bounced from your address. Copies of these messages may be in the archive. To retrieve a set of messages 123-145 (a maximum of 100 per request), send an empty message to: <php-db-get.123_145@lists.php.net> To receive a subject and author list for the last 100 or so messages, send an empty message to: <php-db-index@lists.php.net> Here are the message numbers: 1978 2080 2138 2227 --- Enclosed is a copy of the bounce message I received. Return-Path: <> Received: (qmail 21868 invoked from network); 11 Aug 2000 20:21:54 -0000 Received: from unknown (HELO msm.com.eg) (194.79.100.180) by toye.p.sourceforge.net with SMTP; 11 Aug 2000 20:21:54 -0000 Received: from ns1.msm.com.eg [194.79.100.178] by msm.com.eg with ESMTP (SMTPD32-4.04) id AF0A272E0106; Fri, 11 Aug 2000 23:16:10 +03d00 Received: from localhost (localhost) by ns1.msm.com.eg (8.9.3/8.8.7) with internal id WAA03712; Fri, 11 Aug 2000 22:18:22 +0300 Date: Fri, 11 Aug 2000 22:18:22 +0300 From: Mail Delivery Subsystem <MAILER-DAEMON@msm.com.eg> Message-Id: <200008111918.WAA03712@ns1.msm.com.eg> To: <php-db-return-1978-mma=msm.com.eg@lists.php.net> MIME-Version: 1.0 Content-Type: multipart/report; report-type=delivery-status; boundary="WAA03712.966021502/ns1.msm.com.eg" Subject: Returned mail: User unknown Auto-Submitted: auto-generated (failure) This is a MIME-encapsulated message --WAA03712.966021502/ns1.msm.com.eg The original message was received at Fri, 11 Aug 2000 22:18:18 +0300 from sourceforge.net [198.186.203.33] ----- The following addresses had permanent fatal errors ----- <mma@msm.com.eg> (expanded from: <mma@msm.com.eg>) ----- Transcript of session follows ----- ... while talking to mail.msm.com.eg: >>> RCPT To:<mma@mail.msm.com.eg> <<< 550 unknown user <mma@mail.msm.com.eg> 550 <mma@msm.com.eg>... User unknown --WAA03712.966021502/ns1.msm.com.eg Content-Type: message/delivery-status Reporting-MTA: dns; ns1.msm.com.eg Received-From-MTA: DNS; sourceforge.net Arrival-Date: Fri, 11 Aug 2000 22:18:18 +0300 Final-Recipient: RFC822; <mma@msm.com.eg> X-Actual-Recipient: RFC822; mma@mail.msm.com.eg Action: failed Status: 5.1.1 Remote-MTA: DNS; mail.msm.com.eg Diagnostic-Code: SMTP; 550 unknown user <mma@mail.msm.com.eg> Last-Attempt-Date: Fri, 11 Aug 2000 22:18:22 +0300 --WAA03712.966021502/ns1.msm.com.eg Content-Type: text/rfc822-headers Return-Path: <php-db-return-1978-mma=msm.com.eg@lists.php.net> Received: from toye.php.net (sourceforge.net [198.186.203.33]) by ns1.msm.com.eg (8.9.3/8.8.7) with SMTP id WAA03710 for <mma@msm.com.eg>; Fri, 11 Aug 2000 22:18:18 +0300 Received: (qmail 19701 invoked by uid 1013); 11 Aug 2000 20:19:27 -0000 Mailing-List: contact php-db-help@lists.php.net; run by ezmlm Precedence: bulk list-help: <mailto:php-db-help@lists.php.net> list-unsubscribe: <mailto:php-db-unsubscribe@lists.php.net> list-post: <mailto:php-db@lists.php.net> Delivered-To: mailing list php-db@lists.php.net Received: (qmail 19627 invoked from network); 11 Aug 2000 20:19:27 -0000 From: umobiva@ostrichneck.org Sender: bennettm@localhost.localdomain Message-ID: <3994603C.11D1AA14@ostrichneck.org> Date: Fri, 11 Aug 2000 16:21:16 -0400 Reply-To: umobiva@ostrichneck.org X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.2.12-20 i686) X-Accept-Language: en MIME-Version: 1.0 To: php-db@lists.php.net Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Subject: [PHP-DB] conditional page loading --WAA03712.966021502/ns1.msm.com.eg-- <--------end