Recently I have seen a trickle of email spam that have been getting though my spam filters. These messages are relatively small plain text messages.
The Bayesian filter is the seeing this as 50% likely to be spam, while DSPAM is correctly marking this as spam
X-Spam-Status: No, hits=2.963 tagged_above=-99 required=4.9 tests=BAYES_50, DSPAM_SPAM, URIBL_JP_SURBL
Maybe, I will increase the score associated with DSPAM, or find a rule on the SpamAssassin Rules Emporium that will catch these.