troubleshooting Question

Exchange 2003 NDR message: You do not have permission to send to this recipient

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llaravaFlag for Afghanistan asked on
ExchangeEmail Servers
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Hi,

I have a vendor that seems sometimes seems to be getting this messages when they send emails to our email servers.

We have an Exchange 2003 Server and we use Postini for inbound/spam filter.

User1@mydomain.com is the user that we hos in our Exchange ORG.

This is the email that they get when the message is bounced back.

-----------------------------------------------

Your message did not reach some or all of the intended recipients. Subject: RE: commercial Sent: 3/15/2012 11:05 AM The following recipient(s) could not be reached:

  user1@mydomain.com on 3/15/2012 11:05 AM
  You do not have permission to send to this recipient. For assistance, contact your system administrator.
  <mail.ocrra.org #5.7.1 smtp;550 5.7.1 Requested action not taken: message refused>

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We are missing emails becuase of this problem. Could someone please help me out to troubleshoot?

Thank you
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