SMTP Error OU-002 (COL0-MC1-F17)

When sending emails to hotmail addresses, i get the following response sent to my email address;

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address
failed:

"xxxxxxxxxxxx@hotmail.com":
SMTP error from remote server after MAIL command:
host: mx1.hotmail.com
OU-002 (COL0-MC1-F17) Unfortunately, messages from 212.227.17.13 weren’t sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.

The emails on your account are being sent from your own SMTP server. It looks like your email server is on a blacklist, you can check 212.227.17.13 by following the link below.

http://mxtoolbox.com/supertool.aspx?action=blacklist%3A212.227.17.13#

You would need to speak to your email provider to resolve this issue.

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