Le 11 janv. 07 à 17:41, Mark Martinec a écrit :

>> Some mail are tagged as Spam (in the header) BUT are not considered
>> as spam when we have a look at amavisd log ??
>> They seemed to be marked as non spam mail.
>
> The choice between 'CLEAN' and 'SPAM' in the "Passed CLEAN" log entry
> is determined by kill_level of recipients (if any recipient of the
> message sees message spam level above his kill level, the major  
> contents
> category becomes CC_SPAM).
>
> Marking of message in its header (Subject **SPAM**, etc) happens
> at tag2 level, which is either the same as kill level (in which
> case there is no discrepancy between marking and log entry),
> or tag2 level may be lower than kill level, in which case
> message with spam score between both levels would appear
> as you describe.
>
>   Mark

Thanks,

This was quite clear, to me.

Our code for tagging spam is as follow :


> # string to prepend to Subject header field when message exceeds  
> tag2 level
> $sa_spam_subject_tag = '##### TASPAM ##### ';   # (defaults to  
> undef, disabled)
>                              # (only seen when spam is passed and  
> recipient is
>                              # in local_domains*)
> $sa_spam_report_header = 1;


Our problem was very well describe in a june 2005 post (Mark  
answered) but there was no follow-up:

> > I'm running a mail gateway in front of Exchange using postfix,  
> amavis, and
> > spamassassin.  I have virus scanning on the Exchange server, so I  
> use the
> > gateway for Spam filtering only (@bypass_virus_checks_maps =  
> (1)).  Most of
> > the time this works great.  However, I have a few messages come  
> through
> > with tagged subject lines and no X-Spam entries in the header.  I  
> have
> > $sa_tag_level_deflt = -20.0, so that I should be inserting  
> headers on
> > almost every message.  I have modified the $sa_spam_subject_tag  
> so that I
> > can be sure it's amavis that is inserting the tag (and it is).
> > What would trigger a subject line tag but not insert X-Spam headers?
>
> > I'm running on SuSE 9.3 Pro, with the vendor packages.  postfix  
> 2.2.1-3;
> > amavis 2.2.1-5; spamassassin 3.0.2-4
>
> Hmm, this is not supposed to happen, at least some X-Spam-* headers
> should be present if Subject gets modified.
> Could you please increase the log_level to 4 and search the log
> for 'headers CLUSTERING: NEW CLUSTER' of a message that
> is lacking X-Spam-* headers. The flags in that log entry are
> of interest.
>
> Btw, setting $sa_tag_level_deflt to undef makes it lower than
> any score, i.e. X-Spam-Status and X-Spam-Level should always
> appear for local recipients, regardless of spam score.
>
>   Mark

Our two mail servers are also used as mail gateway for filtering  
purposes (inbound and outbound).
For inbound we are using policy_bank MYNETS.

 From what we observed tagging of subject with ##### TASPAM #####   
(our tag) occurs on outgoing AND incoming messages in a totally  
random manner (we have not been able to find a common behavior for  
all taged mails).


Wrongly tagged mail are logged as 'non SPAM' and no header are added  
to these mail // ONLY the Subject is tagged. Amavisd log logs them as  
'Passed CLEAN' and they are tagged !!

> Jan 11 15:44:53 ns2 amavis[52433]: (52433-28) Passed CLEAN,  
> [193.51.206.66] [212.157.42.163] <[EMAIL PROTECTED]> ->  
> <[EMAIL PROTECTED]>,<[EMAIL PROTECTED]>, Message-ID: <734001c7358e 
> [EMAIL PROTECTED]>, Resent-Message-ID:  
> <[EMAIL PROTECTED]>, mail_id: 0SOuysmi15Xr,  
> Hits: 0.144, queued_as: CD07431F654, 6197 ms


This behavior is really problematic for us because users are  
filtering mail on their own after receiving them (based on these tag).



I guess I'll try to follow up with the same solutions by increasing  
the debug level.

We will catch this 'bug' this time, It has been around for too long !



Do you have any clue ?

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