F-SECURE ANTI-VIRUS - FOR MICROSOFT EXCHANGE Administrator's Manual page 213

Spam Scanning
Spam detection
Action on connection
failure
Trusted networks
Administration with Web Console
Increasing cache sizes may increase the threat
detection performance but it requires more disk
space and may degrade the threat detection
rate. Cache sizes can be disabled (set the size
to 0) for troubleshooting purposes.
Click Clear cache to clear the detection service
cache.
Enable or disable the threat detection service
while scanning inbound messages for spam.
Specify the action for messages when the threat
detection center cannot be contacted and the
threat detection engine cannot classify the
message.
Pass through - The message is passed through
without scanning it for spam.
Heuristic Scanning - F-Secure Content Scanner
Server checks the message using spam
heuristics.
Specify networks and hosts in the mail relay
network which can be trusted not to be operated
by spammers and do not have open relays or
open proxies.
Define the network as a network/netmask pair
(10.1.0.0/255.255.0.0), with the network/nnn
CIDR specification (10.1.0.0/16), or use '*'
wildcard to match any number and '-' to define a
range of numbers (172.16.*.1, 172.16.4.10-110).
CHAPTER 3 213