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2.1.3.2.24 Spam Confidence Level

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To generate an X-MS-Exchange-Organization-SCL header, clients set the value of the PidTagContentFilterSpamConfidenceLevel property ([MS-OXCSPAM] section 2.2.1.3) to a value in the range -1 to 10. The value of -1 indicates the message is from a trusted sender and is never treated as spam. Values 0 through 10 indicate the confidence levels calculated from the message content, as specified in [MS-OXCSPAM].

MIME writers SHOULD<55> copy the value of the PidTagContentFilterSpamConfidenceLevel property, which is a PtypInteger32 ([MS-OXCDATA] section 2.11.1), to the X-MS-Exchange-Organization-SCL header, formatting it as a decimal numeric string without separator characters.