Exchange - Some outbound messages being marked as spam and not being sent.

Posted on 2007-10-17
Last Modified: 2008-03-26
We just moved from outsourced e-mail to an internal exchange 2003 server. Everything works great except when users send e-mail to some external recipients they get NDRs.

The two we have had give the follow explanations ...

           You do not have permission to send to this recipient.  For assistance, contact your system administrator.
            <xxxxxxxxxxxxxxxx #5.7.1 smtp;554 5.7.1 The message from (<xxxxxxxxx>) with the subject of (FW: xxxxxxxxxx.) matches a profile the Internet community may consider spam. Please revise your message before resending.>


The following recipient(s) could not be reached:

      'xxxxxxxxxxxxxx' on 10/17/2007 4:00 PM
            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            < #5.5.0 smtp;554 Sending address not accepted due to spam filter>

Any thoughts on this?
Question by:penningtonj
    1 Comment
    LVL 104

    Accepted Solution

    Your DNS is probably not configured correctly.
    Put your domain in to and see what errors it flags in the mail server section. It is probably reverse DNS and SMTP banner errors.


    If your question has been answered, please remember to accept the answer and close the question.

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