Whitelist Script Cuts Off Spam

I wanted a way to create a whitelist that we could use with Exchange Intelligent Message Filter (IMF) on Exchange Server 2003 Service Pack 2 (SP2) without also losing my ability to use a blacklist. But if you convert the blacklist to a whitelist, you lose your blacklist functionality. To use the blacklist as a whitelist, the only method I could find through an Internet search was a solution (see http://forums.msexchange.org/m_1800395576/printable.htm) that causes items to be moved into the pickup folder where they're rerouted for delivery, whereas with traditional blacklisting, a piece of blacklisted mail is moved out of the delivery queue. Here are the steps for this solution:

1. In Exchange System Manager (ESM) under Global Settings, Message Delivery, Properties, Sender Filtering, add the addresses you want to whitelist.
2. Check only the Archive filtered messages and Accept messages without notifying sender of filtering check boxes.
3. Open a command prompt and enter your mailroot folder drive: \Program Files\Exchsrvr\Mailroot\vsi n\ (n is the instance number of the SMTP virtual server).
4. Create an NTFS junction point by using linkd.exe (from the Windows Server 2003 Resource Kit tools) or junction (formerly a Sysinternals utility, now offered by Microsoft at http://www.microsoft.com/technet/sysinternals/fileanddisk/junction.mspx) by running either of the following commands:
   
   

   For linkd.exe:

   linkd filter /D pickup

   . . .