Thresholds can be decimal numbers, so you can use, say, 5.3 if you want. Some people have good results with thresholds as low as 2. The most common threshold for SpamAssassin is 5. The default value for the CS mailserver is 7, which is a very conservative setting-it's pretty unlikely to flag something as spam when it's not, but it also lets a fair amount of spam in untagged. The most common thing to customize is your spam score threshold. To create an empty config file, from a command prompt on one of our Linux clients, run the following commands: You can use that file to customize SpamAssassin's behavior for your messages. SpamAssassin uses a configuration file in your home directory (on our Linux clients) to supplement its Department-wide configuration. The Filtering Spam with Procmail page describes how to automatically filter messages that have been flagged as spam. The SpamAssassin page describes what is done by default to spam-flagged messages. Any message whose overall score is equal to or greater than 7 is flagged as spam. SpamAssassin's default rule scores have been chosen based on experience with large quantities of both spam and non-spam messages.īy default, the CS Department uses a threshold of 7 for its spam classification. Some rules have negative scores, indicating that messages with those features are probably not spam. It considers each rule in turn and if it determines that a rule applies to or matches the message, then that rule's score is added to the message's overall score. SpamAssassin uses a set of rules that control how it scores each message. 4 Prevent Certain Email Addresses from Being Considered Spamįor an overview of how we use SpamAssassin in our department, please first read our SpamAssassin article.
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