PureMessage for Microsoft Exchange: how it correlates the spam score with IMF SCL

  • Article ID: 39882
  • Updated: 21 Oct 2008

Issue
PureMessage and Exchange 2003 SCL (spam confidence level). How PureMessage for Microsoft Exchange correlates our own spam score with IMF SCL.

Sophos product and version
PureMessage for Microsoft Exchange, version 3.0.1

Operating system
Windows Server 2003+

Technical Information:

PureMessage in AVAS mode is compatible with Intelligent Message Filtering (IMF) - it will increase the value of the Spam Confidence Level (SCL) applied by the IMF, if it is below the PureMessage rating based on the following:

if ( lSpamScore < 10 ) return 0;
if ( lSpamScore < 20 ) return 1;
if ( lSpamScore < 30 ) return 2;
if ( lSpamScore < 40 ) return 3;
if ( lSpamScore < 50 ) return 4;
if ( lSpamScore < 60 ) return 5;
if ( lSpamScore < 70 ) return 6;
if ( lSpamScore < 80 ) return 7;
if ( lSpamScore < 90 ) return 8;
return 9;

Additional information
More information can be found on the Microsoft website:

 

 
If you need more information or guidance, then please contact technical support.

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