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For more information, please read the Mail::SpamAssassin::Conf documentation.

Possible autolearn states

In SpamAssassin 2.5 and 2.6, there were only three states for the autolearn result:

• ham: the message was learned as ham (non-spam)
• spam: the message was learned as spam
• no: the message was not learned
  

ham, spam, and no. In SpamAssassin 3.0, the result was enhanced to have six states: ham, spam, no, disabled, failed, and unavailable.ham and spam are the same. no is now

• ham: the message was learned as ham (non-spam)
• spam: the message was learned as spam
• no: explicitly that the message didn't achieve the proper threshold values

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• and requirements to be learned
• disabled: means that the configuration specifies bayes_auto_learn 0 or use_bayes 0 and so no autolearning is attempted

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• failed: means that autolearning was attempted, but couldn't complete. This happens if SpamAssassin can't gain a lock on the Bayes database files, etc.
• unavailable

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• : catch-all for anything not covered above.
  

Question: Which of the six states means "Autolearn not performed: message already learned"?

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