It seems that if DKIM or SPF is verified, the bayesian learning doesn't matter.
X-Spam-Status: No, score=3.6 required=5.0 tests=BAYES_99,BAYES_999,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HTML_MESSAGE,SPF_PASS autolearn=no version=3.3.2
It seems that if DKIM or SPF is verified, the bayesian learning doesn't matter.
X-Spam-Status: No, score=3.6 required=5.0 tests=BAYES_99,BAYES_999,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HTML_MESSAGE,SPF_PASS autolearn=no version=3.3.2