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Possible Greylisting Question

Posted on 2006-05-26
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Last Modified: 2010-03-06
I received the following error and I'm guessing it is a greylisting issue, but would like to know for sure.

You do not have permission to send to this recipient.  For assistance, contact your system administrator.
<mail.domain.com #4.7.1 smtp;451 4.7.1 Termporarily rejected.  Try again later.>

Thanks,
Steve
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Question by:c_ur_f8
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Sembee earned 500 total points
ID: 16777322
That looks like an attempt at grey listing.
However whatever is doing the grey listing has sent back a fatal error instead of a temporary error and Exchange has NDR it.

Simon.
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