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 : Content Filtering: Key Words and Key Phrases
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JSpamFilter performs both message content and document structure analysis.
  • After the look-up tests, JSpamFilter performs a variety of content-based tests as part of the examination of incoming email messages.
  • These tests scan the document for key words and phrases and work in conjunction with the document mark-up filters described in the next section.

The key word and key phrase tests are organized into a two-tiered framework:

  1. Key word and key phrase searches based on the entries in the Filter File
  2. Conditional Sub-Searches Triggered by Other Filter Hits
A filter "hit" occurs when JSpamFilter finds content in the message that corresponds to an entry in the Filter File. JSpamFilter searches the buffered portion of the incoming message* for the key words and phrases to determine how the message score is adjusted.
The amount of the message that is buffered is set in the JSpamFilter.conf file. Increasing the buffer size increases processor utilization somewhat. For details see the manual section Part 5 (jspamfilter.conf: JSpamFilter License and Log Directory)
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