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Important: The X-pstn-settings header will not available in a message that was delivered to multiple (envelope) recipients. However, if the sending mail server establishes a separate connection for each recipient, then an individual recipient’s spam settings information will be displayed in the header.X-pstn-settings: 5 (2.0000:8.0000) r p M CThe parenthesized pair of numbers indicates the user's base threshold and effective threshold. These are derived values and should not be directly interpreted, as they are subject to change.If any C, M, P, or R filter that the user turned on has a value less than 85, the effective threshold value is a multiple of the base threshold value. If none of these filters is less than 85, the threshold value is the same as the base value.The final letters on the line indicate what filters the user had turned on and which had values less than 85 (these are in upper case). In the above example, the make-money-fast (M) and the commercial offer (C) category filters were triggered.The final step in determining whether an email is quarantined or not is to compare the spam score against the threshold value.If the spam score is less than the effective threshold, the email is considered spam. If it is greater, the email is sent to the recipient's inbox.X-pstn-levels: (S: 0.00000/60.95723 R:95.91080 P:95.91081 M:64.93900 C:93.23770 )X-pstn-settings: 5 (2.00000:8.00000) r p M CIn this example, the spam score is 0.00000 and the effective threshold is 8.00000. Since 0.00000 is less than 8.00000, this message is spam.
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