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Exchange 2003 Sending Mail Problem

Posted on 2010-11-23
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Last Modified: 2012-05-10
Recently some members of my staff started receiving bounced email messages.  Specifically, the error below:

Your message did not reach some or all of the intended recipients.

      Subject:  RE: How are yu doing

      Sent:     11/17/2010 4:55 PM

The following recipient(s) cannot be reached:

      alf@eyd.biz on 11/19/2010 5:06 PM

            You do not have permission to send to this recipient.  For assistance, contact your system administrator.

            <Mail.mydomain.com #4.7.1 smtp;450 4.7.1 <Mail.mydomain.com>: Helo command rejected: Host not found>

How do i fix this?
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Question by:deklinm
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santoshmotwani earned 500 total points
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There could be many reasons .

But please check this link first :

http://support.microsoft.com/default.aspx?scid=kb;en-us;q284204
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