Bayesian database training tip

Here is a tip for training your SpamAssassin bayesian database

Make sure you decrypt the body of the email before sending it to SpamAssassin to learn the tokens.

When I upgraded to the latest version of Maia Mailguard, I forgot to add the decryption key to /etc/maia.conf.  This caused the encrypted data to be sent to SpamAssassin.  This was causing SpamAssassin to get a lot more false positives.

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