Spam criteria includes a spam catch rate/detection threshold setting and configurable lists for approved and blocked senders and for text exemption rules.
To configure spam scanning conditions:
Under Spam/phishing emails on the scanning conditions selection screen for the Other rule type, select the check box next to Spam detection settings.
Click Spam detection settings. The Spam detection settings screen appears.
To enable spam scanning, select the check box next to Select a spam catch rate or specify a detection threshold. If you do not select this check box, InterScan™ Messaging Security Appliance (IMSA) will not label any email messages that violate this rule as spam. You can, however, still take actions on any senders in the Blocked Senders list below.
Select one of the following spam catch rates or specify a detection threshold.
High—Catches more spam. Select a high catch rate if too much spam is getting through to your clients.
Medium—Catches an average amount of spam (the default selection).
Low—Catches less spam. Select a low catch rate if IMSA is tagging too many legitimate email messages as spam.
Specify a detection threshold—Specify a threshold value (between 3.0 and 10.0) that represents how critically IMSA analyzes email messages to determine if they are spam.
(click here for more information)
Select the check boxes next to any of the following lists to enable them:
Approved sender list—Prevents IMSA from identifying email from senders in this list as spam.
Blocked sender list—Forces IMSA to identify email from senders in this list as spam.
Text exemption list—Prevents IMSA from identifying email that contains any of the text in this list as spam.
For instructions on configuring the lists, see Configuring Approved and Blocked Sender Lists.
Click Save to continue selecting scanning conditions.
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