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dude02Flag for United States of America

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Undeliverable Email on Exchange 2010

I don’t have something setup correctly on my 2010 Exchange Standard. When users send any email out to hotmail and other domains are being reject. Please see the following error message: rejected your message to the following e-mail addresses: ( gave this error:
OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit for email delivery information and support

A problem occurred during the delivery of this message to this e-mail address. Try sending this message again. If the problem continues, please contact your helpdesk.

I know I don’t have something setup correctly. I have the Exchange server pointed to two DNS servers. Do I need to have a DNS on the Exchange Server at well? I am just trying to figure out the problem.

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Alan Hardisty
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You do NOT need your server running as a DNS server, only as a DNS client which is the default and pretty much standard to every computer.
So I would focus on checking if your IP address is blacklisted as a spammer. Sites like work.