Hi Martijn,
at Mailshell you can download a free Exchange-Plugin that can

• create a per user spam folder in Exchange 2000/2003,
• move tagged incoming spam messages to the spam folder,
• automatically clean up the spam folder,
• log events to a text file.
  

The Exchange plugin will look for a specified message header to determine if an e-mail is spam.

And here is the problem with ORFilter: ORFilter adds

X-ORFilter: Total score = 0 to e-mails that are not spam.

Could you change the X-ORFilter-header, depending on the low-value of the changesubject-handling parameter?

For example:
If total-score< low-value

X-ORFilter: Total score = <value>

if total-score>= low-value

X-ORFilter: SPAM Total score = <value>

Thanks again,
Achim