SpamAssassin and Bayes learning

[francwalter]

Hello

I use SpamAssassin 3.3.1 on Ubuntu 12.04 with Postfix 2.9.1-4 and AMaViS 2.6.5

All the time I move Spam when I get, to my Spam-folder, where I have some spam 
together since the last two years.
All night I use the script "salearn-from-mails", to learn from the spam which 
is:

#!/bin/bash -e

SADIR=/var/lib/amavis/.spamassassin
DBPATH=/var/lib/amavis/.spamassassin/bayes
SPAMFOLDERS="\
    /home/vmail/example.org/franc/.Spam/new \
    /home/vmail/example.org/franc/.Spam/cur \
    "
HAMFOLDERS="\
    /home/vmail/example.org/franc/cur \
    "

for spamfolder in $SPAMFOLDERS ; do \
    echo Learning spam from $spamfolder ; \
    nice sa-learn --spam --showdots --dbpath $DBPATH $spamfolder
done

for hamfolder in $HAMFOLDERS ; do \
    echo Learning ham from $hamfolder ; \
    nice sa-learn --ham --showdots --dbpath $DBPATH $hamfolder
done

chown -R amavis:amavis $SADIR



When I look of the learnings I get some results:

root@example:~# sa-learn --dbpath /var/lib/amavis/.spamassassin/bayes --dump 
magic
0.000          0          3          0  non-token data: bayes db version
0.000          0        801          0  non-token data: nspam
0.000          0       5585          0  non-token data: nham
0.000          0     127343          0  non-token data: ntokens
0.000          0 1332999307          0  non-token data: oldest atime
0.000          0 1338539336          0  non-token data: newest atime
0.000          0 1338535082          0  non-token data: last journal sync atime
0.000          0 1338524715          0  non-token data: last expiry atime
0.000          0    5529600          0  non-token data: last expire atime delta
0.000          0       1989          0  non-token data: last expire reduction 
count


in my 

/etc/spamassassin/local.cf

I have:

use_bayes 1
bayes_auto_learn 1
bayes_auto_expire 0
bayes_path /var/lib/amavis/.spamassassin/bayes


But when I send an email with the content and Subject of an old spam-mail this 
passes without much bayes-score:

...
X-Virus-Scanned: Debian amavisd-new at ew6.org
X-Spam-Flag: NO
X-Spam-Score: 2.49
X-Spam-Level: **
X-Spam-Status: No, score=2.49 required=5 tests=[BAYES_50=0.8,
        FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001,
        T_RP_MATCHES_RCVD=-0.01, URIBL_DBL_SPAM=1.7] autolearn=no
...

What am I doing wrong?

Thanks in advance,

frank