Hotmail: 550 Command rejected for policy reasons

[OJM]

I'm getting a lot of emails being bounced by Hotmail, with the details being;

Reporting-MTA: dns;win2.m****here.biz
Received-From-MTA: dns;jh-oun7am8b1dcf
Arrival-Date: Tue, 2 Jan 2007 16:13:30 -0500
Final-Recipient: rfc822;******@hotmail.com
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;550 Command rejected for policy reasons. For troubleshooting information, go to http://postmaster.msn.com

Can this be rectified at all? Let me know if you need my domain name.

Many thanks.

 

[Stephen]

Send via a real mailserver instead of using localhost

 

[OJM]

Ah right.

I was using CDONTS which wasn't using an SMTP server.

Changed to CDOSYS with authentication to see if that helps.

Thanks Stephen.