These links are compared to a number of online blocklists. SpamAssassin SURBLS (Spam URI Realtime Blocklists)Īll messages are scanned for links to Internet locations or URIs (Uniform Resource Identifier). The numerical value assigned by the Bayes filter is included in the X-Spam-Status header as 'Bayes'. The Bayes score is combined with the score assigned by the static rules.
User-Trained: Messages that have been marked by end users of the mail system as either spam or not spam. Self-Learned: Messages that exceed a score of 12, and both the header score and body score are above 3, or messages with a score that is below 0.1. Kerio Connect processes two types of messages into the Bayes database: This intelligence includes a database of message characteristics that updates continuously. The Bayes, or Bayesian filter is a dynamic component of SpamAssassin that works similarly to rules, however its intelligence is not statically pre-defined. For example, a score of 4.2 would be represented as '****'. X-Spam-Level: - The cumulative score represented by a count of asterisks. X-Spam-Flag: - YES, or NO to indicate if the message is spam. 
X-Spam-Status: - The cumulative score (hits), the threshold value 'required', and all positively evaluated rules with their associated values 'tests'. Kerio Connect inserts this value as a score into the headers of the message. SpamAssassin evaluates the message against its rules and assigns a numeric value to the message. Kerio Connect passes the content of messages to SpamAssassin. 
Modification to the rules is not recommended. The rules are located in the SpamAssassin folder of the mailserver directory.
SPAMASSASSIN DNS SCORE UPDATE
SpamAssassin includes a preconfigured set of static rules that update with specific releases of Kerio Connect. SpamAssassin provides three layers of spam protection: This article describes in more detail the anti-spam features and outlines the implications of each feature. For a general overview of each feature, refer to configuring spam control in Kerio Connect. Kerio Connect provides multiple features to prevent spam.
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