On Tue, 31 May 2016, Peter Carlson wrote:

I will investigate this (URIBL_BLOCKED) further tomorrow (https://wiki.apache.org/spamassassin/CachingNameserver),

Note: caching != recursing. You can have a caching forwarding local nameserver, which won't fix URIBL_BLOCKED.

however I doubt that it is causing the bayesian classifier to report as ham.

It's not.

https://wiki.apache.org/spamassassin/ImproveAccuracy

I have gone through this wiki (and ones like it) at least a dozen times.   My 
server is blocking about 50% of the spam, thanks
to some of the other layers of spam protection.  It's just bayes that I can't 
seem to get right

            Why is it marking all messages as ham?

      Probably because you're overtraining as ham.

I have tried the following 3 scenarios:
      1.  Training SPAM only  (it's in its own folder)

Won't work, bayes needs both spam and ham to be able to tell the difference. If that actually *did* get hits on BAYES_00 in this scenario then you likely are not training the bayes database than SA is actually using.

What user are you training Bayes as, and what user is SA running under?

      2.  Training a folder with known HAM

This is the only reliable method.

      3.  Training with inbox as HAM

See earlier comments.


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