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IMF and Exchange SP1 got me

I eagerly installed the IMF into my production Exchange environment on the day it was released and unfortunately tripped over my own eagerness. I have 2 servers in a front/back-end setup and I applied SP1 to my front-end and installed IMF there and everything was okay and both installs went smoothly. My backend Server because I had clients connecting to it I wanted to wait until I could schedule an outage to apply SP1 so I didn't upgrade this straight away. Since the IMF installed okay and I couldn't find anything that told me I needed SP1 on all my Exchange servers I decided to turned it on and test it out. Well it worked "sort of" the SCL was being set fine on all the messages going though and my Back-End server was responding to this but instead of just junking all mail with the default SCL of 8 it was junking every email. Going back over all the doco I couldn't see any problems with my install so I put it down to not having SP1 on my Back-end Server. Last night I managed to get SP1 on my Back-End Server and this morning re-enabled the IMF and everything is now fine. The anti-spam Infrastructure has been around since the release of 2003 so I still find it a little weird that I had this problem but so far I like the IMF.

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All sample scripts and source code is provided by for illustrative purposes only. All examples are untested in different environments and therefore, I cannot guarantee or imply reliability, serviceability, or function of these programs.

All code contained herein is provided to you "AS IS" without any warranties of any kind. The implied warranties of non-infringement, merchantability and fitness for a particular purpose are expressly disclaimed.