Arthur Hagen has offered us the following clue :

> Albert <albert@ilestpasla.com> wrote:
>> Hello,
>>
>> I've switched to version 3.x of spamassassin and now I have some
>> trouble. This is not a basic trouble, I've read all the doc and
>> followed all the upgrade procedure, spent hours on google.
>> When I submit a test message to spamassassin like :
>> spamassassin -D < spam_message
>> the listing is OK, the subject line is modified with ------Spam------
>> as required in local.cf on the listing
>> But the message is unchanged ! No subject change, no flag.
>> So, everything seems to work, but I cannot filter the spam.
>>
>> Anybody has an idea ?
>> Thank you.
>
> Tried "spamassassin --lint"?
>
> Regards,

This is the output :

[27412] warn: config: cannot open "/etc/mail/spamassassin/secrets.cf":
Permission non accordée
[27412] warn: config: warning: score set for non-existent rule
FUZZY_GUARANTEE
[27412] warn: config: warning: score set for non-existent rule FUZZY_BILLION
[27412] warn: config: warning: score set for non-existent rule FUZZY_XPILL
[27412] warn: config: warning: score set for non-existent rule
FUZZY_PRESCRIPT
[27412] warn: config: warning: score set for non-existent rule
FUZZY_SOFTWARE
[27412] warn: config: warning: score set for non-existent rule
SUBJECT_FUZZY_TION
[27412] warn: config: warning: score set for non-existent rule
FUZZY_PHARMACY
[27412] warn: config: warning: score set for non-existent rule
FUZZY_TRAMADOL
[27412] warn: config: warning: score set for non-existent rule FUZZY_OFFERS
[27412] warn: config: warning: score set for non-existent rule
SUBJECT_FUZZY_VPILL
[27412] warn: config: warning: score set for non-existent rule
FUZZY_MEDICATION
[27412] warn: config: warning: score set for non-existent rule FUZZY_CREDIT
[27412] warn: config: warning: score set for non-existent rule
FUZZY_THOUSANDS
[27412] warn: config: warning: score set for non-existent rule FUZZY_CPILL
[27412] warn: config: warning: score set for non-existent rule
FUZZY_OBLIGATION
[27412] warn: config: warning: score set for non-existent rule
SUBJECT_FUZZY_PENIS
[27412] warn: config: warning: score set for non-existent rule FUZZY_MONEY
[27412] warn: config: warning: score set for non-existent rule
SUBJECT_FUZZY_MEDS
[27412] warn: config: warning: score set for non-existent rule
FUZZY_CELEBREX
[27412] warn: config: warning: score set for non-existent rule FUZZY_FOLLOW
[27412] warn: config: warning: score set for non-existent rule FUZZY_PLEASE
[27412] warn: config: warning: score set for non-existent rule FUZZY_VICODIN
[27412] warn: config: warning: score set for non-existent rule FUZZY_ERECT
[27412] warn: config: warning: score set for non-existent rule FUZZY_VLIUM
[27412] warn: config: warning: score set for non-existent rule FUZZY_MILLION
[27412] warn: config: warning: score set for non-existent rule
FUZZY_AFFORDABLE
[27412] warn: config: warning: score set for non-existent rule FUZZY_REMOVE
[27412] warn: config: warning: score set for non-existent rule FUZZY_ROLEX
[27412] warn: config: warning: score set for non-existent rule FUZZY_AMBIEN
[27412] warn: config: warning: score set for non-existent rule
FUZZY_MORTGAGE
[27412] warn: config: warning: score set for non-existent rule FUZZY_PRICES
[27412] warn: config: warning: score set for non-existent rule
FUZZY_REFINANCE
[27412] warn: config: warning: score set for non-existent rule FUZZY_VIOXX
[27412] warn: config: warning: score set for non-existent rule
SUBJECT_FUZZY_CHEAP
[27412] warn: config: warning: score set for non-existent rule FUZZY_VPILL
[27412] warn: config: warning: score set for non-existent rule FUZZY_PHENT
[27412] warn: config: warning: score set for non-existent rule FUZZY_MILF
[27412] warn: lint: 37 issues detected, please rerun with debug enabled for
more information

It does not seem to show something useful.
When I do "spamassassin < spam_message > output.txt" I get a correct message
in outout.txt with flags and subject changed. The only thing is that I
would like the spam_message itself to be changed.