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Topic # 58970 24-Mar-2010 08:36
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I’m having problems with the SCL (Spam Confidence Level) on MICROSOFT Exchange 2007/SBS2008, it started with clients getting ‘failure notice’ or ‘Mail delivery failed: returning message to sender’ emails with the error: 550 5.7.1 Message rejected as spam by Content Filtering. So I examined the Agent Log file in the Transport Roles\Logs folder and found the error SclAtOrAboveRejectThreshold, 7 which I think means reject messages that have an SCL rating greater than or equal to 7. I reviewed more Agent Logs and traced other occurrences of this happening to other clients, how can I fixed this but also allow the SCL to do its job of rejecting spam?

Also what is the appropriate size for a mailbox on Exchange 2007, I think default the quota was around 5GB but I have removed the quota for a couple of users & wasn’t sure how to approach this. Does the Server hardware or amount of disk space make a difference, should I get the user to do some housekeeping in Outlook?

Thanks for your time


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BDFL - Memuneh
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  Reply # 310550 24-Mar-2010 08:51
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When I was running my own Exchange Server I had it configured to mark the SCL on the message and delivery it anyway. Then on the client side we enabled the Junk Folder. Outlook will look into the SCL and will move it into the Junk Folder depending on the SCL.

This way messages were not just discarded. Some spam going through but mostly were positive and few few false positive.

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