What is an SCL? How does the Edge server use the SCL?
The Edge server is configured to catch all spam with a high Spam Confidence Level (SCL). The Exchange Intelligent Mail Filter (IMF) evaluates message headers, content and other components of incoming mail and assigns an SCL ranking between zero and nine. An SCL of nine identifies a message that is almost certainly spam and an SCL of zero ranks a message that is highly unlikely to be spam.
