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How do I configure emails to be deposited to the junk email folder?

IMF Tune does not change anything in the way emails are moved to the junk email folder. Hence this is purely a matter of configuring the Exchange 2007/2010 Content Filter or the Exchange 2003 Intelligent Message Filter and the email clients.

Below we walk through the basic server-side configuration. Once configured, emails will end up in the junk folder for all mailboxes for which this functionality is enabled. Important: There exists a per mailbox enablement setting that ultimately determines whether or not the Junk Folder is to receive emails. For more details check: Why aren't emails ending in the junk email folder?

Exchange 2007/2010 Content Filter

The Content Filter forms part of a set of anti-spam transport agents that ship with Exchange 2007/2010. These must be run on a server having the Edge or Hub transport server role. The Edge server installation includes the anti-spam agents out of the box. The same applies to Small Business Server (SBS) 2008. However in case of Hub Transport servers (except for SBS), the agents must be installed manually through the command shell.

The installation script is located under:
<Exchange Server dir.>\Scripts\install-AntispamAgents.ps1

1. On the Hub transport server machine, from the Exchange 2007/2010 program group, open the Exchange Management Shell.

2. Change directory to: <Exchange Server dir.>\Scripts\

3. Run> .\install-AntispamAgents.ps1

4. Restart the MS Exchange Transport service

With the Anti-spam agents installed we can now configure the Junk Threshold. Again we have to use the command shell:
Set-OrganizationConfig -SCLJunkThreshold <SCL threshold value>

<SCL threshold value> is the threshold value between 1 and 9. Emails with an SCL greater (but NOT equal) to the threshold will be moved to Junk.

To check the current threshold setting we can run the cmdlet:
Get-OrganizationConfig

Exchange 2003 Intelligent Message Filter

1. Open the Exchange System Manager

2. Open the Message Delivery properties under Global Settings.

   

3. Select the Intelligent Message Filtering property sheet.

   

4. In the Store Junk Email Configuration section set the SCL threshold. Emails with greater (but not equal) SCL rating will end up in the junk email folder.

5. Click OK to save changes.