I am not able to receive emails from our account. I can send them, but we seem to be restricted from receiving emails temporarily. Here is a message received.

SMTP error
220 BAY0-PAMC1-F6.Bay0.hotmail.com Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at http://privacy.microsoft.com/en-us/anti-spam.mspx. Mon, 14 Oct 2013 22:11:05 -0700

Mail rejected by Outlook for policy reasons. The mail server IP connecting to Outlook has exhibited namespace mining behavior. If you are not an email/network admin please contact your Email/Internet Service Provider for help.

How can we fix this?

Thanks

Sean Hopwood