troubleshooting Question

Exchange error need some help please.

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web-rocketFlag for United States of America asked on
Internet MarketingExchangeSBS
9 Comments1 Solution952 ViewsLast Modified:
Below is an error I am getting from my clients when they try to send email to certain company's.  It seems to be very random and only happens maybe once a week. I have checked the email in question and it seems fine to me.

451-4.4.0 Primary target IP address responded with: " Your access to this mail system has been rejected due to spam or virus content. If you believe that this failure is in error, please submit an u

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