Create Transport Rule to set Spam Confidence Level

Create Transport Rule to set Spam Confidence Level

Issue: Some emails sent via any application goes to Junk Folder in Outlook.

Cause:  This happens when users send emails via applications and use senders who are not present in AD. Outlook fails to authenticate such sender or find the content of email/attachment as inappropriate.  In Exchange 2007 this was fixed by adding internal domain in Safe Senders in Outlook but in Exchange 2010 we cannot add internal domains in Safe Senders.

Resolution: This can be fixed by creating a transport Rule which sets the SCL to -1 (Outlook considers all the emails with SCL -1 as safe.)

Please follow the below mentioned steps to create a new transport rule for setting spam confidence level to -1 for emails which are sent any application

New-TransportRule -Name "Allow lab.com" -Comments "This rule will set SCL -1 for internal emails to prevent them from going to junk folder" -FromAddressContainsWords "lab.com" -SetSCL -1 -ExceptIfSCLOver 0

Restart Microsoft Exchange Transport Service on all the Hub Transport Servers