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Posted to users@spamassassin.apache.org by Scott <te...@msxc.com> on 2017/08/11 03:15:48 UTC

Re: Bayes auto-learn - not happening, tentative success....

Well, here's a development...

About the only difference in my old, functioning box and this new "clean"
install was the location of the bayes files.

Old box:
/var/spool/amavisd/.spamassassin/
New box:
/etc/mail/bayes

The other details that caught my attention were that on the old box, the
ONLY bayes thing that was explicitly set was the path, which was:
bayes_path /home/amavis/.spamassassin/bayes

On this (new) box, I commented out most of the bayes settings similarly.
Restarted amavis/SA and got some errors about no bayes db. Ignored.

Sent an email anyway. Guess what? autolearn=ham right out of the gate, it
and created the database files.

And the very next message received was also shown as autolearn=ham.

** that eliminates any doubt that a minimum corpus is necessary to autolearn
(whether that's a good practice is a different topic).

I cleared the db's with sa-learn --clear. I received a new message,
autolearn=ham, again. Result:

[root@mail2 .spamassassin]# su amavis -c 'sa-learn --dump magic'
0.000 0 3 0 non-token data: bayes db version
0.000 0 0 0 non-token data: nspam
0.000 0 1 0 non-token data: nham

[root@mail2 root]# ll /var/spool/amavisd/.spamassassin
total 28
-rw-rw-rw- 1 amavis amavis 12288 Aug 10 21:20 bayes_seen
-rw-rw-rw- 1 amavis amavis 12288 Aug 10 21:20 bayes_toks
-rw-r--r-- 1 amavis amavis 1869 Aug 8 15:32 user_prefs

I gradually restored all the bayes settings in local.cf, restarting amavis
each time, clearing the db and sending that same test message.
Each time the result was autolearn=ham

Finally to the path setting:

I tried setting the default path, and changing the path filename suffix of
bayes to mybayes for curiosity...
bayes_path /var/spool/amavisd/.spamassassin/mybayes

Upon sending a test message, SA promptly auto-learned as ham and created the
2 new files starting with "mybayes" instead of bayes.

So changing the filename didn't hurt autolearn

Next I kept the new name and changed the folder back to where it was:
/etc/mail/bayes/mybayes
Send a test message
This time, NO new file was created. It apparently cannot write to it.
Permissions on mail, and on bayes are both amavis:amavis & 777.

**** autolearn=unavailable **** (As Matus expected)

Next, I log on as amavis. cd to /etc/mail/bayes. Create a file, edit it,
and then delete it. User amavis CAN write there. I verify I'm amavis, Try
to cd to some other user's folder, get "permission denied", check.

Finally, because I don't like the hidden directory anyway, I try to move the
bayes folder from the default. I configure the bayes path to:
bayes_path /var/spool/amavisd/bayes/bayes

Send my test message, voila, db files created, and autolearn=ham Success!
(tentative, cautiously optimistic)

I hope I have solved the mystery. For reasons beyond my skill set, SA will
not auto-learn to a bayes db in a folder in /etc/mail/bayes. Regardless of
wide open permissions on everything except /etc. And the user's confirmed
ability to write to the folder.

Bug I guess?

SHIT! What a PITA to figure out.

I'm gonna let this cook overnight and see how it does. Will report back.

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