Whitelist 

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The list of friends contains email addresses with display names. Messages from these addresses are automatically recognized as non-spam. This check is performed before the plug-in applies rules and uses  statistical classifier. That is why the messages from friendly addresses will never be filtered out as spam.

The following options are available in Training section on the Filtering page of the main configuration window:

• Learn messages from friends as non-spam.
  Messages from friendly addresses are considered as non-spam and so training the classifier using them will be good for the classification quality. Sometimes spammers insert a valid, existing email address to the "From" field, but the plug-in detects most of these cases and doesn't learn as non-spam the suspicious messages. The plug-in automatically removes email addresses in spam (in the "From" field) from the whitelist.
  
  
• Add friends automatically.
  The plug-in automatically adds the email addresses of senders from the messages learned as non-spam to the whitelist. You can feed a set of non-spam messages you have to the plug-in right after the installation. In this case, the whitelist will be filled with your friends' contact addresses automatically.
  
  
• Extract email addresses from message bodies.
  Email addresses will be extracted from message bodies and added to the whitelist.
  
  
• Use display names during checking the whitelist.
  The probability of misclassifying a spam message with a friendly address is greater than zero. You can make it lower by filling the whitelist only with addresses having display names. This option prevents the plug-in from adding addresses without display names to the whitelist when you use non-spam messages to train the plug-in. When this option is enabled the plug-in checks display names along with email addresses while classifying incoming messages.
  
  
• Import Address Book automatically
  If this option is enabled, the plug-in imports the contacts from your address book on every start. You can also import the contacts manually from whitelist page (using Import WAB button).
  

You can edit the whitelist manually in the dialog box for editing friendly addresses. Also, you can export and import whitelist items from text files. 

Wildcards are allowed in display names and addresses. For example, you can specify "*" as a display name if you want the plug-in to ignore it (check only email address) for a certain friendly contact. "*@<server>" as an email address means that all users from that email server are whitelisted.