Exchange Server 2003 SP2 and Intelligent Message Filter
Although this is a rather old subject, I was recently approached by someone experiencing difficulties with Exchange 2003 SP2 and IMF (Intelligent Message Filter) so I thought I would quickly let you all in on a little tip, for those of you who haven’t as yet installed Exchange 2003 SP2, which I can’t imagine would be too many of you.
Before you start installing SP2, you need to uninstall the Intelligent Message Filter (IMF). By doing this, the settings from the SMTP virtual server where you allowed filtering are also removed.
After the SP2 installation, go to Intelligent Message Filtering settings (Global Settings -> Message Delivery -> Properties -> Intelligent Message Filtering tab) and setup IMF with the same settings as earlier. However, that alone does not reactivate IMF.
You still need to enable IMF from the SMTP virtual server properties -> General tab -> Advanced Edit and check “Apply Intelligent Message Filter” – just as you need to check the relevant options for recipient filter, connection filter, sender filter, and the new option of applying SenderID filter.
Hopefully someone finds this information in some way useful.