User manual
criterion will be taken into account accordingly for the overall value.
Combination of Values to Overall Spam Probability
The individual values of all combined criteria are weighted according to their defined
relevance to establish a final evaluation. The job compares this overall value (the spam
probability of the message) with the three threshold values and allocates the e-mail
accordingly to one of the four spam probability ranges (None to High). When all
combined criteria are taken into account, our sample e-mail with the three words from the
dictionary may, therefore, still be classified as spam.
In this example, the e-mail in which six words from the dictionary were found, and which
was consequently classified as spam according to this criterion, can still fall into spam
probability category None or Low when the other criteria are considered.
The overall value is calculated from the relevance of the criteria, the minimum and
maximum values and the individually set spam probability ranges.
You will find the individual combined criteria on four tabs under Advanced
Configuration.
The following tables provide an overview of the combined criteria contained in the job.
Note: For further information on combined criteria, refer to the technical whitepaper
or contact our Support.
Combined No Spam Criterion
Criterion Description
Emails containing these phrases Checks whether message bodies contain business
words that are typical for the user.
Combined Classification Criteria
Here the results of other spam filtering products – which often use only a single junk
filtering method – are included. Their combination with other criteria in the Wall Spam
Filtering job eliminates the disadvantages of these products.
Criterion Description
Exchange SCL value
Also refer to Definite No-Spam Criteria and Write
spam result in Exchange SCL field
The Intelligent Message Filter (IMF) also
determines a spam probability for each message.
the so-called Spam Confidence Level (SCL) – from
-1 to 9. The higher the spam probability, the larger
the SCL. This criterion can be used to include the
SCL value in the Avira AntiVir Exchange spam
evaluation.
For further information refer to
http://www.microsoft.com/technet/prodtechnol/
exchange/2003/library/imfdeploy.mspx
Avira AntiVir Exchange 7
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