We are using windows server 2008 Server R2. We installed IIS and the SMTP relay component. It is setup to relay mail to our exchange 2010 CAS server. All internal mail is relaying properly on this server to the exchange 2010 CAS server to internal email addresses. When someone tries to send to a recipient outside the organization such as to domain name hotmail.com, gmail.com microsoft .com, it does not relay the message. When I check the logs it looks like it does not even relay the external email address to the cas server.
The error message we get is below. Please assist in what is wrong.
Delivery has failed to these recipients or groups:
gogear22@hotmail.com
Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address may only accept e-mail from certain senders, or another restriction may be preventing delivery.
Generating server:PRI.cross.com
gogear22@hotmail.com
#< #5.7.1 smtp;550 5.7.1 Unable to relay> #SMTP#
Original message headers:
Received: from HH-DATAserver ([192.111.111.2]) by PRI.cross.com with Microsoft SMTPSVC(7.5.7601.17514); Wed, 7 May 2014 20:12:03 -0300 From: hh-dataserver<hhdataserver@pri.cross.com> To: <gogear22@hotmail.com> Date: Wed, 7 May 2014 18:12:03 -0500 Subject: test messase X-Mailer: SMTP Mail Component MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Return-Path: it@hh.cross.com Message-ID: <HH-DATAserverMwVN7miR9Odu00000056@pri.cross.com> X-OriginalArrivalTime: 07 May 2014 23:12:03.0714 (UTC) FILETIME=[C2029620:01CF6A49]