Re: [AMaViS-user] spamassassin bayes learning

Aktor,

> Hi,
>
> I've got this architecture..
>
postfix ->> amavisd-new -> postfix -> maildrop -> sa-learn -> mailbox
> | |
> V V
> clamav spamassassin
>
> With local.cf and amavisd.conf default files values
>
> If I use that arquitecture and I got and spam the following happens
>
> General file:
>
> AsteriX root # sa-learn --dump magic --dbpath
> /var/lib/amavis/.spamassassin/
> 0.000 0 3 0 non-token data: bayes db version
> 0.000 0 49 0 non-token data: nspam
> ^^
> 0.000 0 5243 0 non-token data: nham
> 0.000 0 164847 0 non-token data: ntokens
> 0.000 0 1106523114 0 non-token data: oldest atime
> 0.000 0 1111140245 0 non-token data: newest atime
> 0.000 0 1106526477 0 non-token data: last journal sync atime
> 0.000 0 1111123833 0 non-token data: last expiry atime
> 0.000 0 0 0 non-token data: last expire atime delta
> 0.000 0 0 0 non-token data: last expire reduction count
>
> Per user file:
>
> aktor@AsteriX aktor $ sa-learn --dump magic
> 0.000 0 3 0 non-token data: bayes db version
> 0.000 0 572 0 non-token data: nspam
> ^^^
> 0.000 0 1996 0 non-token data: nham
> 0.000 0 203323 0 non-token data: ntokens
> 0.000 0 1086896787 0 non-token data: oldest atime
> 0.000 0 1111127201 0 non-token data: newest atime
> 0.000 0 0 0 non-token data: last journal sync atime
> 0.000 0 1111102285 0 non-token data: last expiry atime
> 0.000 0 29436939 0 non-token data: last expire atime delta
> 0.000 0 0 0 non-token data: last expire reduction count
>
>
> If I start amavisd-new daemon I got the following:
>
> AsteriX root # amavisd-new debug-sa
> [..]
> debug: bayes: 20621 tie-ing to DB file R/O
> /var/lib/amavis/.spamassassin/bayes_toks
> debug: bayes: 20621 tie-ing to
> DB file R/O /var/lib/amavis/.spamassassin/bayes_seen
> debug: bayes: found bayes db version 3
> debug: bayes: Not available for scanning, only 49 spam(s) in Bayes DB <
> 200 ^^
> debug: bayes: 20621 untie-ing
> debug: bayes: 20621 untie-ing db_toks
> debug: bayes: 20621 untie-ing db_seen
> debug: Score set 0 chosen.
>
> And the mail is tagged as:
>
>>>>
> X-Virus-Scanned: por AMAVIS + CLAMAV en aktornet.ath.cx
> X-Spam-Status: Yes, hits=9.0 tagged_above=0.0 required=4.0
> tests=DATE_IN_FUTURE_03_06, FORGED_HOTMAIL_RCVD2, HTML_70_80,
> HTML_MESSAGE, HTML_MIME_NO_HTML_TAG, INFO_TLD, LONGWORDS,
> LOTS_OF_STUFF, MIME_HEADER_CTYPE_ONLY, MIME_HTML_ONLY
> X-Spam-Level: ********
> X-Spam-Flag: YES
> <<<
>
> No BAYES_XX tag
>
> ---- **** ----
>
> But... if I start 'spamd' daemon and use spamc client to test the mail
> it switches the user so I get the following results:
>
>>>>
> X-Spam-Flag: YES
> X-Spam-Checker-Version: SpamAssassin 3.0.2 (2004-11-16) on AsteriX
> X-Spam-Level: **************************
> X-Spam-Status: Yes, score=26.1 required=5.0 tests=BAYES_99,
> DATE_IN_FUTURE_03_06,DNS_FROM_RFC_POST,FORGED_HOTM AIL_RCVD2,
>
> HTML_FONT_BIG,HTML_FONT_FACE_CAPS,HTML_MESSAGE,HTM L_MIME_NO_HTML_TAG,
> LONGWORDS,MIME_HEADER_CTYPE_ONLY,MIME_HTML_ONLY,
> RCVD_IN_BL_SPAMCOP_NET,RCVD_IN_DSBL,RCVD_IN_NJABL_ PROXY,
> RCVD_IN_SORBS_HTTP,RCVD_IN_SORBS_WEB,RCVD_IN_XBL,U RIBL_OB_SURBL,
> URIBL_SC_SURBL,URIBL_WS_SURBL autolearn=unavailable version=3.0.2
> <<<
>
> Because it uses per user bayes_* files...
>
> debug: lock: 20926 created
> /home/aktor/.spamassassin/bayes.lock.AsteriX.20926
> debug: lock: 20926 trying to get lock on /home/aktor/.spamassassin/bayes
> with 0 retries
> debug: lock: 20926 link to /home/aktor/.spamassassin/bayes.lock: link ok
> debug:
> bayes: 20926 tie-ing to DB file R/W /home/aktor/.spamassassin/bayes_toks
> debug: bayes: 20926 tie-ing to DB file R/W
> /home/aktor/.spamassassin/bayes_seen
> debug: bayes: found bayes db version 3
> debug: bf4c273193a655e812f3dbbfedcbfefcb6224671@sa_genera ted:
> already learnt correctly, not learning twice
> debug: bayes: 20926 untie-ing
> debug: bayes: 20926 untie-ing db_toks
> debug: bayes: 20926 untie-ing db_seen
> debug: bayes: files locked, now unlocking lock
> debug: unlock: 20926 unlink /home/aktor/.spamassassin/bayes.lock
> debug: is spam? score=26.121 required=5
>
>
> Is there any way to make amavisd-new use per user files instead of
> general file /var/lib/amavis/.spamassassin/bayes_* ??
>
> If it's not, which solution do suggest?

first: it's not possible to use per user sa settings or bayes settings.
SA is called by the user that amavisd runs as.

Because of the different score here's an explanation:
http://www.ijs.si/software/amavisd/#faq-spam
(SpamAssassin returns different score....)

If you need per user settings you can disable sapm checking in amavisd
and let spamd/spamc handle it or you can use spamassassin directly
with maildrop. This is an example which is used in some howtos:

if ( $SIZE < 26144 )
{
exception {
xfilter "/usr/bin/spamassassin --prefspath=$HOME/$DEFAULT/.spamassassin/user_prefs"
}
}

Every user must then have his own prefs file but so it were possible
to use different settings.


--
Best Regards
Daniel Luttermann




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