Hi jry,
To view the header information of the junk emails please follow the below given steps:
1. Open the email message
2. Right click on the message
3. In the drop down click on 'view source’
4. You should be able to view the header information of the mail
Once you have the header information, please send a mail to the abuse team at abuse@msn.com with the information so that the can help you further with this issue.
Please reply for further assistance
Thanks!