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You likely have a problem with your recipient policies. &nbsp;It sounds like mynewserver.com is setup, but newserver.com.mx is not. &nbsp;See <a href="http://www.computerperformance.co.uk/exchange2003/exchange2003_recipient_policy.htm" rel="ugc">http://www.computerperformance.co.uk/exchange2003/exchange2003_recipient_policy.htm</a>.
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You likely have a problem with your recipient policies.  It sounds like mynewserver.com is setup, but newserver.com.mx is not.  See http://www.computerperformance.co.uk/exchange2003/exchange2003_recipient_policy.htm [http://www.computerperformance.co.uk/exchange2003/exchange2003_recipient_policy.htm].

<div>
Sorry that was for 2003. &nbsp;In 2007 recipient policies are called email address policies.
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Sorry that was for 2003.  In 2007 recipient policies are called email address policies.

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check if you have SMTP Service installed. if yes. disable it or uninstall it... <br />
test the mail flow
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check if you have SMTP Service installed. if yes. disable it or uninstall it...
test the mail flow

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<div class="content wysiwyg-content">
I have setup a new server at a ISP (in internet) with Windows 2003 Server R2 64 bit and have installed Micosoft Exchanger Server 2007 sp1<br />
<br />
After the setup I can send emails from mynewserver.com to other servers and to my emial account, but when I reply to those messages, I get the following error:<br />
<br />
Reporting-MTA: dns;bay0-omc3-s24.bay0.hot<wbr />mail.com<br />
Received-From-MTA: dns;BAY143-W20<br />
Arrival-Date: Sat, 23 May 2009 18:04:01 -0700<br />
<br />
Final-Recipient: rfc822;administrator@newse<wbr />rver.com.m<wbr />x<br />
Action: failed<br />
Status: 5.7.1<br />
Diagnostic-Code: smtp;550 5.7.1 Unable to relay for administrator@newserver.co<wbr />m.mx<br />
<br />
Can you please help? It have setup a SMTP connector already. 
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</div>


I have setup a new server at a ISP (in internet) with Windows 2003 Server R2 64 bit and have installed Micosoft Exchanger Server 2007 sp1

After the setup I can send emails from mynewserver.com to other servers and to my emial account, but when I reply to those messages, I get the following error:

Reporting-MTA: dns;bay0-omc3-s24.bay0.hotmail.com
Received-From-MTA: dns;BAY143-W20
Arrival-Date: Sat, 23 May 2009 18:04:01 -0700

Final-Recipient: rfc822;administrator@newserver.com.mx
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp;550 5.7.1 Unable to relay for administrator@newserver.com.mx

Can you please help? It have setup a SMTP connector already. 

smtp;550 5.7.1 Unable to relay for

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.