Exchange 2010 external users


We have all email address hosted in godaddy.And we have installed exchange server 2010 in
our office to download emails from godaddy server.Then distributing to the out look users
with exchange config.
Some users are always using email from out of office so we didnt create user for them in exchange .Issue is when we are sending emails to particular users who is out of office getting the bounce back email with error below.

Please send me the steps which we have to make in exchange 2010 to avoid this issue.

Delivery has failed to these recipients or groups: (
The e-mail address you entered couldn't be found. Please check the recipient's e-mail address and try to resend the message. If the problem continues, please contact your helpdesk.
Diagnostic information for administrators:
Generating server: EAGLE-EXG01.EAGLE.LOCAL
#550 5.1.1 RESOLVER.ADR.RecipNotFound; not found ##
Original message headers:
 ([::1]) with mapi id 14.01.0218.012; Mon, 10 Oct 2011 20:12:23 +0400
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: AJESH <>
To: "" <>
Subject: test mail
Thread-Topic: test mail
Thread-Index: AcyHZuzFzSfmWHI8Sd+0F8P9U5skWw==
Disposition-Notification-To: AJESH <>
Return-Receipt-To: <>
Date: Mon, 10 Oct 2011 20:12:22 +0400
Message-ID: <8106C688D2686C48817FD1CB1609DF731313F773@EAGLE-EXG01.EAGLE.LOCAL>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator: <8106C688D2686C48817FD1CB1609DF731313F773@EAGLE-EXG01.EAGLE.LOCAL>
MIME-Version: 1.0
X-Originating-IP: []
Who is Participating?
the message says you are sending an email to a non existing mailbox. does exist?
if yes ar eyou using the same domain internally and externally?
mahmood66Author Commented:
thanks dear, we found our mistake and now its ok. if any new issue we will ask thanks
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