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:
- In Exchange System Manager (ESM) under Global Settings, Message Delivery, Properties, Sender Filtering, add the addresses you want to whitelist.
- Check only the Archive filtered messages and Accept messages without notifying sender of filtering check boxes.
- 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).
- 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
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