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Working with Filters and Policies > Managing filters > Creating and configuring a filter > Antispam
Antispam
Administrator Help | TRITON AP-EMAIL | Version 8.2.x
The antispam analysis function checks email for various characteristics of spam. If the email hybrid service is enabled and configured as a pre-filter, it performs antispam analysis as well. (Email Hybrid Module is required.) If email hybrid service is not configured or available, a combination of other on-premises tools are used for effective antispam analysis.
The email hybrid service analyzes incoming email and blocks any message that it recognizes as spam. Mail that the hybrid service allows into the system for processing includes a header that contains an analysis result score. The email system uses this score to determine how to handle the message. If that score exceeds a specified spam threshold, the email system treats the message as spam and handles it according to applicable policy. In this case, the on-premises email protection software does not perform its own, separate antispam analysis.
Email hybrid service must be configured and running for this option to be displayed. In the Email Hybrid Service Analysis box, mark the Use email hybrid service analysis with a threshold score for spam of check box to enable email hybrid service spam scoring. Select a spam score from the drop-down list (floating point number between 0 and 20; default is 6).
If this check box is not marked (the default) or email hybrid service is not enabled, the on-premises software performs a complete antispam examination using any or all of the following tools in the Filter Properties Tools list.
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Digital Fingerprinting analysis. When enabled, digital fingerprint analysis checks content for any digital fingerprint of known spam.
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LexiRules analysis. When enabled, the LexiRules tool analyzes email content for word patterns commonly found in spam.
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Heuristics analysis. When enabled, heuristics analysis checks the message header or content for spam characteristics.
Set the heuristics analysis sensitivity level, from lowest to highest (default is Medium).
If you want message size to determine whether antispam analysis is bypassed, mark the Bypass antispam analysis if message size exceeds check box and enter a message size in KB (default is 1024).

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Working with Filters and Policies > Managing filters > Creating and configuring a filter > Antispam
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