Question : What are the correct Pointer Records that need to be setup.

I have an Exchange 2003 Server setup that has a public IP address of:  1.1.1.1
Its primary MX record goes to a spam filtering service (public IP: 2.2.2.2) which then forwards the filtered email to the Exchange server on 1.1.1.1  (no MX record is setup for 1.1.1.1)

When the Exchange server sends emails, it goes through the same company that does the spam service (setup as a Smart Host) but it goes through the IP:2.2.2.3 (on the same subnet as the MX record)

How should by Pointer Records be setup?
The problem I have is that I am getting bounced back messages when sending to Hotmail.com  (this started only a few days ago, and not changes have been made)

The bounced back error is:
"Recipient: [SMTP:captainsven@hotmail.com]
      Reason: 550 OU-002 Mail rejected by Windows Live Hotmail for policy reasons."

Thank you.

Answer : What are the correct Pointer Records that need to be setup.

That depends what it sais its name is in the EHLO greeting.
If you have a look in my profile I have a 'test' email address there which you are welcome to send a test email to and I will lookup the settings from the email headers.
Please post here if you send an email.