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Spamfire Manual > Setting up Spamfire > Spamfire Preferences > The Filter List > Negative Score Filters

Negative Score Filters

If there are messages you want Spamfire to accept, you can create filters that apply a negative score to messages that trigger them. A negative score filter can lower a message's spam score so that Spamfire will accept the message. This is a very powerful way to avoid false positives and boost Spamfire's accuracy.

  • You can create filters with large negative scores, like -300, to ensure that certain messages are always accepted.

  • Or you can create filters with smaller negative scores, like -40, to make Spamfire more likely to accept a message, but still reject the message if other filters bump its spam score quite high.

See How to Make a Filter.

Some useful negative score filters

  • Check messages for the names of your company's products.

  • Check messages for keywords related to topics you want to hear about.

  • If you do business using eBay or PayPal or other electronic transaction systems, check messages for text patterns that appear in the messages you receive when new orders come in.

  • Check messages for your physical mailing address or phone number. These messages might be from Web sites where you have placed orders. It is unlikely that a spammer would ever get hold of your mailing address or phone number.

  • Check messages for the quoted text of your outgoing email signature. Someone replying to a message you send might quote your entire message, including your email signature.

  • Check messages for special email "passwords." For example, when giving out your email address to new friends, you could tell them to put the text "--friend--" in the subject and have a filter that will accept those messages.

  • If you have Web forms that are emailed to you, check messages for certain subjects or hidden text fields.