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Mail rejected by policy error

Occasionally over the last week we have been getting the following error when trying to send emails:

You do not have permission to send to this recipient.  For assistance, contact your system administrator.
            <xxx.com #5.7.1 smtp;550 5.7.1 Mail rejected by policy: v=1.0 c=1 p=..............>

Any suggestions as to what is causing this?  Thanks a ton, in advance.

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turtletrax
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turtletrax
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1 Solution
 
pamikenCommented:
Permissions problem.  For some reason the sender is not allowed to email this account.  Perhaps an anonymous user is trying to send mail to a distribution list.
Check SMTP Virtual Server Access Tab.  Try checking this box: Allow computers which successfully authenticate to relay
User may have a manually created email address that does not match a System Policy.
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turtletraxAuthor Commented:
Hello,

The user that is getting this error is trying to send to one of her contacts which she has emailed many times in the past.  I checked under the Relay restrictions tab of SMTP Virtual server properties I already had the "allow all computer which successfully authenticate to relay" box checked.

Thanks for your help
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turtletraxAuthor Commented:
I found the problem to be the new spam filter that Bresnan has installed.  We are working with them to try and get our domain white listed.  Thanks for your suggestions.
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