F-SECURE ANTI-VIRUS FOR MICROSOFT EXCHANGE 8.00 Administrator's Manual page 285

These settings are used only if F-Secure Spam Control is installed with
the product, otherwise these settings are not available.
Check inbound e-mail
messages for spam
Options
Heuristic spam
analysis
Spam filtering level
Administering F-Secure Spam Control
Specify whether inbound mails are scanned for
spam.
Realtime Blackhole List (RBL) spam filtering is
not enabled by default even if you enable spam
filtering. For information on configuring
Realtime Blackhole Lists, see
Blackhole List Configuration", 289.
Specify whether heuristic spam analysis is used
to filter inbound mails for spam.
If you enable the heuristic spam analysis, all
messages that the threat detection engine does
not classify as spam are further analyzed for
spam. When the heuristic spam analysis is
disabled, only the threat detection engine filters
messages for spam.
Heuristic spam analysis slows down the
performance but improves the spam detection
rate.
Specify the spam filtering level. Decreasing the
level allows less spam to pass, but more regular
mails may be falsely identified as spam.
Increasing the level allows more spam to pass,
but a smaller number of regular e-mail
messages are falsely identified as spam.
For example, if the spam filtering level is set to 3,
more spam is filtered, but also more regular
mails may be falsely identified as spam. If the
spam filtering level is set to 7, more spam may
pass undetected, but a smaller number of
regular mails will be falsely identified as spam.
CHAPTER 8
Realtime
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